M54 piston rings with M52TU oil control rings:
www.ebay.com/itm/131912802729
Project M54 Engine:
forum.e46fanatics.com/showthre...
The big 38+ page oil consumption thread on e46fanatics:
forum.e46fanatics.com/showthre...
This video is for entertainment purposes only. 50sKid assumes no liability for any repairs or modifications performed by the viewer as a result of the information contained in this video.
Dude, you are a blessing. You got the best DIY videos on M54 engines. God bless you.
Haha 'consult an oil ring expert'. I think we already found him. Thanks kid !
11:43 is where the "fix" begins. Excellent video! Thanks
Your videos have helped me immensely! I have an ‘04 320i with the M54 and it lost close to a quart of oil per tank of fuel. After fixing leaking OFHG, oil pan gasket, valve cover gasket, and replacing the CCV system the car didn’t leak anymore, but was consuming at the same rate. I then added the vacuum hose per the O2 pilot mod and the consumption has stopped! Many thanks!
i have same problem after i have changed the all Gasket and CCV System >> No leaking but consumption is rate is same as you... im gonna do the same as you did hope that it will help and i could do it properly
Is that mod complicated? Where can you buy the parts?
@@MauroRubioGiletta I sold the car several years ago and it kept running until a horrible hailstorm hammered it in 2023. You just need about .5 meters of 3mm vacuum hose. Connect one end to the open port on the CCV and the other end to an open port on the rear of the intake manifold. Google “O2 pilot mod”.
I recently purchased my first e46 and I never would have bought it if not for your videos that teach how to do so much. Thank You
Well done sir. I appreciate your through assessment of the entire situation. I've been mulling over my oil consumption periodically, bit with three young children, distract always steps in. It's like you did all the homework for me.
Yes, mine does, 01 330i. Thanks for the explanation! I was at a loss as to what was happening
My 325i is at 202k and most definitely consumes oil as well but has always run strong. I had already been looking into an oil catch can but I didn't know it could possibly help with oil loss. Can't wait to see what happens next with your car man! Keep up the awesome videos, they always help out when my car needs some work.
I love these type of videos where the facts are presented in front of a whiteboard and waiting for a concrete empirical proof.
Thanks for a well thought out video, as usual. I have an 525it E39 M54 engine (2003) and about a year ago started to consume about a quart every 2k miles. Deciding what to do next, please keep more great videos like this one coming. You have definitely the best DIY videos for BMWs.
what did you end up doing?
Another great video, the O2 pilot mod and the catch can do work. Some owners complete the mod however do not check for any oil leaks and assume it's burning oil!!! Thank you again for this video.
Great videos, man. Appreciate your effort in helping us laymen out.
you are a blessing, You got the one of the better DIY videos on M54 engines. God bless you.
OMG thank you so much!!! I love my 04 330xi and clearing up the oil burning issue will be such a relief. Nothing like going for a long drive and realizing that I have not checked my oil 🤤. My car has an almost perfect body and interior. Somehow my suspension is intact at 109,000 miles, I think it is stock. Thanks again. When I can donate I will. I want my son to drive this car when he comes of age and he is currently almost 2.
Jason. You are absolutely right. I have a 328-2000 and a 325-2003 the 328 has the M52tu engine it does NOT burn the oil at all. However the 325-03 at every 3-4 weeks I add at least 1/2 q of oil. Your video is right in all senses. Thank you.
your videos on your channel is very easy to understand I appreciate how you can make e46 easy to understand
great video and explanation. e46fan member here (tbone8ty). I have an oil catch can installed on my e46 330i and I can confirm that it works for my car. I have over 30,000+ miles with my OCC setup. I don't burn any oil anymore. I'm at 200,000 miles. Car pulls strong and runs great. I would recommend an oil catch can or 02 pilot mod over rebuilding if you want to save money. The great thing about it is you can always go back to the oem CCV unit very easily by just switching a few tubes. cheers!
Thanks for sharing. All known solutions in one clip, respect.
Dude so good! Wish this was here before I did mine it would have saved me so much time researching. The AC Delco soak helped my engine run much better but as far as consumption I don't know what role it played because I did it at the same time as the catch can. The CC 100% fixed my oil burning problem. That finding all my leaks and doing the vanos seals changed my car entirely. Don't forget poolman on the boards he was a big addition to this topic. Thanks
Hey 50sKid thanks for the video! I am doing a complete engine rebuild of my M54 engine and was having a hard time finding the M52TU rings. Thanks again for the link.
Hey thanks for noticing the link! I told the guy that he'd sell some of those rings because of my video, lol.
Thanks so much for all you do for this community!
Thank you for the detailed info. Keep up the good staff coming. Please share the results for oil consumption for the moment.
Explains a ton, I keep oil in the trunk :D 2001 330i
Lance Richardson same 2002 325ci
sameeee 01 330ci
Lol 2002 330ci I keep enough oil in my trunk to start a small country.
dude same here mine just started happening @327k miles 2001 330ci. its pissing me off lol
Starting Tech wow nice run ) mine only has 187k miles and already , i add oil every 300 miles
50sKid Thank you!!!!! for everything you doing. I did same research couple of month ago ang also want to use ,m52 oil ring instead m54 ones. But you record it and tell to people. Thank you. I would like to have friend like you!!! :)))) I believe that we can talk continiously about this car )))))
Most helpful video on this subject I have seen!!!! Thanks so very much!
Another great video! dude, you are the man. More work to do in my spare time. (2004 BMW 330ci 6 speed Manual) Car drinks oil. I think this is my problem. (no current leaks, car still consumes oil) THANKS BUDDY!
THANK YOU! I've had horrible oil consumption issues, no oil leaks and not draining into coolant.. just burning it off. I'll be trying the ccv vacuum trick till I can get all my pieces for an engine rebuild
Excellent video!! I always look forward to new content from you. Keep it up!
man you went above and beyond on this video. Catch can setup for me it's not a go since i get below 0 temps out here and i hear it freeze, so i guess since mine its a 325 go with the vacuum line alternative, thanks for sharing
there is another possible solution. forum.e46fanatics.com/showthread.php?t=1066308
I seem to be going through a decent amount of oil. always wondered. I've got a 2001 330ci
Greate video! I have 2000 320i, one of the last pre-facelifts, which already got M54 installed Oil consumption was around 300 ml/1000km when i bought the car. After ccv replacement it dropped a bit to 250ml/1000km, which is quite nice. Maybe i will try this o2 pilot mod and see what happens! Thanks for that! cheers
Keep up the videos! Much informative, very knowledge
I have a 2005 325i and I have over 200,000 miles on it and it’s got a slight leak from the dipstick return tube but it doesn’t burn a drop! I guess maybe I just got lucky or someone changed the oil rings a long time ago! Anyway that’s my experience. I did have to change the alternator because the hose clamps they use dig into the hose and make a hole so I cut off a half inch and replaced the hose to the power steering and dripped on the alternator until failure and I changed the expansion tank and fan clutch and fan and some Knick knacks like rear passenger window motor and washer motor but I still have less than $600 into the car total including purchase! I like it especially after finding that all the codes that caused it to fail and told the previous owner he needed all these parts( a shop,not me) I found that they replaced all the rubber on the intake Except the crankcase vent hose which crumbled as I touched it! I put a high pressure double walled hose with clamps on it and all the codes disappeared! I suspect the oil return hose is in the same shape and that’s probably why it leaks so ,good video,appreciation for the information as I have been a professional mechanic since 1982 but retired a while ago and the newer cars are a lot different from when I worked. Now give me an engine or transmission to rebuild and no problem whatever year because that’s my specialty. I do wrecks of motorcycles from tow yards now because it’s easier and my hobby but I still work on my own vehicles and having a resource with newer vehicles that I am unfamiliar with really saves me a lot of headaches. Thanks and keep them coming.
Thank you for the fine video. I just did this mod today. once I located the ports with the help of a mirror, the total job took about 1 hour. I'll let you know how it goes in a couple months. Update: 3 months later, the car is not consuming oil anymore. the oil level has remained constant. Thanks once again.
Nice!
carlos verduzco So you did the Pilot 02 mod?
yes. oil consumption has diminished.
Hi, was there any negative effects or any difference in engine sound?
Great information. I have 203K on my 330Ci and my round trip to Denver (1000 miles) takes about a quart of oil.
Very interesting...........thanks for the info. I have a E46 ( N42 engine) with 120,000km on it and its using 4 liters every 10,000km.
you are the man. thanks another great vid
Hi, I have a 1999 BMW E46 320i with M52TU 2Ltr inline 6 engine. It had a major oil burning issue for few years, I was changing PCV Valves like every 6 months assuming that is the cause. Finally this week, I realized that both Catalytic converters are blocked because my car lacked power, some hesitation when accelerating on 3rd gear and so forth. So I removed both Cats and found out that those are blocked. I replaced them with Original BMW Cats, now car has awesome performance and the oil burn is reduced like more that 50%. Of course I cleaned the PCV valve with some carb cleaner. now its working fine. So i assume blocked cats can actually cause excessive oil burn also, Because the exhaust gases cannot pass out from the tail pipe efficiently. IF you have serious oil burning issues just try to replace cats and clean the PCV Valve, it should solve the oil burn issue.
I have an 03 530i. Did a seafoam/atf flush before oil change w 0W40 gc. Also did the O2 pilot mod. It didn't burn oil to begin with at 170k miles, but it does leak a bit lol
Thanks for this. It explains why my car is burning oil - thanks! Is there a video or page anywhere that shows me how to do the O2 Pilot Mod?
Just a random thanks for all your videos :)
your videos are a godsend,thanks
Going to be installing the PR1100 kit in the next few weeks. do you have a diy video on the actual install of the rings? you have helped me with the build so much! couldnt do it without ya bud.
Very Informative, thank you
This is one smart individual Thanks for sharing
50sKid, respect!!!
We have a couple of e46s and also an e85 Z4 - all with the M54 engines. I just purchased the e85 with 115 miles. CCV system probably was not ever replaced and I do smell some oil burning from time to time. Thinking the ccv and the o2 pilot mod would be a good project this fall.
Great useful channel learnt a lot, I've got m54 325i with 130k miles on clock, never used any oil between oil changes believe it's stock ccv,I've got a replacement as I'll have rad iator and condenser out since both knackered so goin to replace pump,thermostat, thought be good time to replace ccv @same time as don't know how old it is! Thought to do vanos,timing chain+tensioner @same time hope to chk oil pump nut @same time if l can get to it?
Thank you for this great video, very informative ! Changed the CCV with the hope it might decrease the consumption, but it's still the same (if not worse). Before that tried with some oil additives (Rislone seal repair), it really helped, but it's a very temporary solution, considering one of oil catch can or the O2 pilot mode now. P.S. Subscribed.
so which mode you have gone through >> please advice if oil Consumption has stopped.
@@yassinabousharkh4630 it did not mate, if the m54 oil consumption is high - piston rings. I sold the car long time ago, got myslef an n54, 0 oil consumption with vioent drive most of the time, remapped to 400 plus hp.
dayam man , I had my mechanic change my ccv and I started to drink way more oil in my M54. I thought he damaged it during install or maybe a faulty part from FCP euro , but now after watching this video, I think the piston ring got disturbed from it's original position causing the oil consumption. So bummed.@@nojustno7530
Can you please go buy an E53 car and do videos on that car??!!! Love your videos man. So in-depth with explanations and theories. Will this work for an E53 x5? Its chewing up oil, among other things !
I have an M54 engine with 140k miles after 15 years. No oil consumption issues at all. However, I have seen and worked on others with oil consumption and from what I can confirm is that those with oil consumption issues followed the bmw oil change interval and factory oil. They all had some amount of sludge in the engine which could clog those small holes in the newer oil control rings and wear them out or prevent proper sealing of the rings. I have been using redline synthetic products for the life of the car and my interval is 8k miles. By using some sort of carbon cleaning product to clean out your pistons, could help with clearing out those small holes on those newer rings.
Yeah that is the acdelco cleaner I mentioned in the video. I don't think I'm going to do it because I want to see exactly how much carbon build up there is around the rings. I'm doing the rebuild anyway so no need to try the cleaner..
Hey man, I am late, but none the less impressed! Gonna check this vacuum line thing... kr from Munich!!!
I have already done this on mine so far so good
THANK YOOOOOOOU! My 02 330ci has just under 90,000 miles and all of a sudden its drinking oil so much! Even spitting it out the exhaust with hard acceleration.
Your oil piston rings are bad
THIS IS AMAZING!! THANK YOU!!
Hello from the Netherlands 50skid. Love your video, nice work. Only one question: did you also install the one way valve in the line from ccv to the crankcase? thanks a lot for your answer and nice explaining video's. My car is an 330i toring from 12-2001 Friendly greeting , Ton
No I didn't install a one way valve in that line, only the oil return line.
Hey, super video. I don't find the pistonrings on ebay with the oil control rings for the m52tu and compressionrings for the m54 in one set. Do you have an actual link of them?
Thanks for posting these videos. I own a 2002 330i and am running the same issue of having to put in a quart of oil every 1 k mileage so far. Whats the eBay supplier in Van Nuys that has the ring set? I am going to replace those rings.
kinda glad I have a m52tu now
thanks I will try the vacuum line mod!
Thankfully I have M52B25TU. No consumption whatsoever :) Useful information though!
Its best for an engine to consume some oil. Well known about design. Its also done this way for the reason of the very long change intervals. Best flash some oil off and top off = indefinite lifespan on engine.
Great tutorial 👍
thanks for the great info!
Great video as usual. I just installed oil catch can on my i325 (2003), but left CVC in place with hoses all destroyed. Am now debating whether to revert to this O2pilot mod, vs fix the vacuum leaks on the new oil catch can...
I prefer the o2pilot mod with the stock ccv system
ELBOW GREASE IT'S ME .THANKS FOR CREDIT THAT'S NICE OF YOU
For sure dude!
Can confirm, all the M54 engined cars I hear about consume lots of oil. My M52TUB28 consumes nothing.
Thanks for this info 50. I drive an E60 with an M54b2.2 engine and after doing a lot of preventive maintenance on the engine including complete ccv i was shocked to discover the oil level at minimum level after a 1200km drive. I might have this problem. I will also try to fo the valve stem seals and first i will go with the extra va uum line to the ccv. I hope that will fix it
I can bet you have sticking oil rings. Do a ring decarbonization or rebuild the engine.
@@hanynowsky thanks for replying. Not sure how to do a ring decarbonization. Is that done by an engine decarbonization with these water machines or something?
@@bend__ Partially. But the real thing is to remove fuel pump fuse. Remove the spark plugs. Pour one a small amount of carbon remover liquid onto the spark plug well of each cylinder. Let it sleep the whole night. The morning, crank the engine as many times in order to get the carbon out. Do not forget to put a towel in place of the valve cover plastic cap.
Great job, thanks
Hi 50sKid I do not think, that the reason for a bigger vacuum reducing the oil consumption is that it might push the oil ring more to the cylinder wall. Don't mix that up with compression rings, that often form a gap between the ring and the piston, so that combustion pressure can get behind the ring and push it more to the cylinder wall. This is not the same with the oil ring and the vacuum in the crankcase. Why should the vacuum push / pull the oil ring to the cylinder wall? The force of the vacuum acts in axial direction, not in radial direction. It's something different with compression rings. Because of the gap the (very high) combustion pressure also leads to a force on the ring in radial direction. Even if there is also a little gap behind oil ring: Then the vacuum would even pull the ring away from the wall. But I don't think that happens, because the vacuum is much too weak to do that. In contrast the combustion pressure acting at compression rings, leads to a much bigger force. Therefore I think, the explanation, why a bigger vacuum helps reducing the oil consumption is simply, that the pressure gradient from combustion chamber to crankcase is bigger. As a result there is less oil flow from the crankcase through the gap you were talking about (not to mix up with the gap that I was talking about) to the combustion chamber. Would like to hear your opinion on that :) Best regards, Daniel
Ah I really don't know to be honest. I'm ok with either answer being the correct one. At the end of the day, we have a working solution that costs $2 and people can finally be happy.
DA-Tuning ... i think you found that ring expert you were looking for
I do think u'r pretty much spot on there.
Sir, thanks a lot for your Video. My M54B30 burning oil like 1400km/0.5L, I replaced valve oil seal earlier, but doesn't work, checking my oil separator now. If needs to replace piston rings, that will take lots of money.
use the 02pilot mod or catch can
Hey, thanks for this. it really made it clear (I also checked MLODY's website) why my M54B30 is burning about 1 liter every 1000 kilometers. Just wanted to ask something. I'm planning to rebuild my engine sometimes next year, maybe in the summer and I want to replace the rings using M52 oil rings. Is there any chance the M52 oil rings may cause some damage to the cylinder walls ? I'm curious why BMW changed the design of the oil rings on the M54, maybe they had a reason.
It won't cause damage. The block is exactly the same as the M52TU block, they only changed the pistons and rings and stroke and such. They changed because the M54 rings have reduced friction which gives slightly better mileage.
Good info! Thanks
Hi, I live in a very hot country and the engine always seem to be very hot, even though the temp gauge does not show . Ihave a 2004 BMW 318i E46 motor and have just done 120000kms and has just started using about 500ml every 600 kms. Because of hot conditions some one has told me to use a 20w50 oil to help the problem.. Please let me know urgently if that is ok... Many thanks Teddy
Man, I am now seriously thinking of switching to getting a Volvo! BMW's are way too high maintenance, yeah in the same way as trying to keep a super model happy! I know a guy who has a V50 , treats it likehe hates it but it just keeps going and going. The money I have spent on my 98 e36 I could have a really solid V50. I mean I love my Sport Touring, but man she is so demanding in just the basics! Sorry peeps, I'm disgusting I know. Anyway I love watching your vids they really cheer me up some days. You are definitely a BM nut.
Yeah, had enough of oil leaks and crap like this--> going back to VW or Toyota!
Good Choice Mate Volvo Never lets you down
V50 is a shitbox lmao, it'll probably blow up any day now.
V50 S40 V40 C30 are cheap made volvo cars! Even the XC60 S60 V60 too The cars that are Volvos Are the 70 80 and 90 models so V/XC70 are great S80 and XC/v/s90 and buy the 5cylind engines those are the best high milage engines! feel bad that volvo only makes 4 cynlinder engines only right now! those 1.8F and 2.0F engines sucks and are ford engines!
Yes, I would definitely go for an 850 T5, same era as my current e36, and the 5 cylinder sounds so sweet. V50 also has a Ford Focus chassis. But this guy I used as a comparison just does nothing to his V50, it looks like it has been rolled on the outside. And I know he does zero maintenance but it just keeps going. My problem is that I bought a very clean 18 yr old car with 18 yr old genuine OEM components. so anything made of rubber is now ready for renewal. Drive train, suspension. and any bearings whether be it belt tentioner pulley's, wheels etc. I bought a project and not a daily runner. My bad! but after nearly completing the rubber re-fit and all round suspension replacement, I have a car that is nearly as it came from the factory. Vanos seals and rattle ring next, and I'm almost there (bankrupt) ha ha. I love the BM, and have become nearly as obsessed as the 50's kid. Thanks for your comments, I do see a fair few older volvos around and am guessing if they're naintained properly they like the bmw will last years to I would love a 2016 M5 ultimately though. How about you? And money no object, Pagani Huayra for weekends and track days, and daily, an Aston of some description. Boy these prescription meds are strong. Sorry for verbose retort. Be lucky.
How much vacuum can a crankcase take before some other issue is created? I think Toyota had the same problem.
Thanks for the great vedio and the excellent explanation Do you think the materials which been used foDor engine flush will damage the rings and lead to oil consuming problem ? i have bottle can of liqui moly engine flush and i am still hesitant to use it on my M54 motor on 525i 2004.
no i don't think so but then again if it happens I am not responsible :-)
Thanks
Hey 50sKid. I just bought my 1st 325i 2004. It seems to have a later model intake manifold with out a vacuum take off on the Catalyst airpump, no xhaust flap, and seemingly no vacuum take offs on the firewall side of the manifold. But we are certainly using oil at the rate you describe. Any thoughts on where to get the vacuum from ? There is an oil separator on the power Brake boost vacuum line which terminates into the dip tube FYI. Thanks in advance
my e46 320i with the M54B22 engine have used about 1,8 liter oil (5w30) over 8500-9000km. My oil filter housing gasket was leaking but not much but i did lose a little oil when changing it.
1 liter per 3000 km is roughly equal to the 1 qt per 1000 miles. You've got the same usage as everyone.
My BMW 330i 2002 consumes 1 qt every 2500 miles, apox. Sparkplugs are clean no one has burned or not burned oil, but I thought it wasnt normal till I saw your video.
For the 02Pilot mod on the m54b30 why don't you use the 3rd capped hole since it's free? Also on a boosted engine will you need a check vavle?
Hi thanks for all your help I have just replaced my CCV Valve and 2 upper pipes the lower one seemed fine going to the dip stick but the car EML light is still on and the engine is still misfiring any help please .
I have a 2003 330i with a consumption issue. I definitely want to try the 02 pilot mod . I'm thankful I stumbled upon your videos today. Thank you! Thank you! I also read in a forum about someone who used the valve cover from a M56 along with it's integrated CCV to completely eliminate the system used by the M54. I would be interested in your comments on that.
The M56 valve covers are extremely expensive and hard to find.
If one could be found at a reasonable cost, would it be a solution to the problem, particularly in a cold climate? I am moving from Tennessee to Michigan in a few months. The previous owner of my 330i had already installed the cold climate CCV system.
At 186k miles now. The cold climate CCV doesn't have the port needed for the 02 pilot mod. I'm consuming a quart every 400 miles.
Hi! Great video, what about thickering oil going from 5-30 to 5-40 for example?
No it will increase the heat in the engine. I thought it was fine and I've ended up ruining my cooling system and thermostat while also having this oil consumption issue
Hi Jason, based on the explanation, the wear of the oil control ring seems to be based on mileage and not age, would you agree? I have 2x M54 engines, one in a 325Ci and another in a Z4, both have an excess of 200K miles. Both continue to burn oil even after 02 Pilot mod install. After viewing your engine rebuild videos, huge project, wondering if I can't get away w/buying a used low mileage M54 engine instead. I found one w/58K miles, seems like an engine (transmission) swap would be cheaper and easier. I may be able to p/u the pair for under $800. Thinking might as well keep the pair (engine/tran) together. I did hear the section, where the ring becomes unseeded, w/out knowing the history of the used engine there is always that risk despite low mileage. FYI - both of my M54 engines started burning oil right at or around 188K miles. Thoughts on going w/low mileage engine to address oil burn?
Hi, Where does the smaller vacuum line lead to, the one on which you propose to connect a T-connector for purposes of reducing oil consumption? I was working on my car and it just came off. Seems to have been loose on the rubber end. Now I cant find where to plug. Help. Thanks
I have a 325ti compact, all 3 ports were capped off and not in use. I've fitted the o2 pilot mod and so far its stopped the oil consumption.
hi and thx for all the info- the link doesn't work anymore and the company that made you the combo kit doesn't ship abroad, any other way to get them ? i'm desperate
I'll do the catch can first, then maybe rebuild in the summer 👌🏼
This is new to me just because me 2001 BMW 325i with only 85000K started to drink oil out of no where and its kinda messed up just because I bought the car and it was fine and now it started doing this to me. Ill just do a catch can setup for now till I can put my LS 5.3L in the car. -Leave it to BMW to reinvent the wheel.
I have a 325i 2002 and it burns oil .. i would like to know like how much does that cost to get fixed
What if you removed the valve and spring from the stock CCV and placed the pcv you used in other videos inline to the intake using modified hoses with a check valve on the drain tube? Do you think that Would place enough vacuum on the crank case and still get all vapors by the oil separator in the same way? I appreciate your videos. It has helped me feel more comfortable with tackling these problems myself and helped me understand my car. Thank you.
If you removed that diaphragm it wouldn't be air tight. The little cover would leak around it. The 02PilotMod is the easiest way to modify the stock system to have higher vacuum.
Thanks for the video will this work also in my X3 2.5 2004 I have and oil consumption problem with good compression engine
yes
The oil that’s going to the combustion chamber is that going to affect the engine in any way or does the oil just burn
I have a 2.5 liter M54 with 188,000 miles on it in an E39 and it doesn't burn any oil. It has never had the engine apart to my knowledge, so I guess I've been lucky with the stock internals so far.
You're a lucky person XD
Ive got a 330ci 2005 facelift vert.... Ita consumed 4L in 1000 miles... No leaks, ideas? Ccv? Or rings?
Did you have visible blue smoke out the tail pipe?
Mine has been burning oil now for 2years and I manged to remedy it slightly by a good flush and adding liqui moly stop oil leak (from 1liter per 800kms to 1 liter per 2000kms) as I suspected valve stem seals. Car does not smoke under power or on idle but every now and then if it had a cold start with short drive and shut off it might puff a bunch of smoke on startup a day later. Would valve seals be more likely or rather piston rings?
I have two E46 325 with the m54, one just started to burn some oil at 280 000 km after i had a problem with the ccv, the other one which has 150 000 km never burns any oil at all. Maybe some wear comes too soon if you don't use high quality oil, i always use 5w30 high quality oil, it's expensive but less expensive than to have to make some work on the engine.
Thanks mate 👍
On FCP Euro, there's a set ($32 per piston) of CRP rings with a three piece oil control ring design. When you replace the rings on this motor, do you just leave the cylinder liners alone? Can't really hone the alusil liners.