[FEDE/E92]

Guys I had the same problem with my car 07 with 80k, change everything I could think off. Recently started having power issues at WOT, troubleshoot a little and found my intake valves were caked. Ended up doing a cleaning on the intake valves, the car regain all the power that was missing at WOT and the oil consumption problem is gone.

[335coupepr]

My car went to the dealer, we will see what they say now, then I will do a valve check, but my car only have 38,000 miles.

[335coupepr]

Originally Posted by 335coupepr

My car went to the dealer, we will see what they say now, then I will do a valve check, but my car only have 38,000 miles.

Now that you mention it, when I first got the car and notice the oil consuption, I took off the intake tuve and TB off. The intake manifold had lots of oil inside, also the intake tuve, Blow off valve, etc had oil . Then the turbos were replaced and so on. So who knows my valves are clog or full of deposits. The dealer is going to do a compresion test done, we will see. Thanks

[Jnat]

I have been using Rotella T6 5-40 for years on my turbo cars. I have found that it reduces oil in my intake tubing and I experience little to no oil loss at all. I change it every 4-5k. I know a lot of BMW owners poo poo this oil for some reason but my experience over the last six to seven years using it is very positive.

[335coupepr]

Now, the shop is saying that my oil sensor is bad. They dicided to mesure how much oil was in the car and find out my car had close to two quaters more. F--k, I could off break my seals. The sensor was working improperly, everybody out there that have oil problems, make sure to get the oil out and check it. At least got the valve cover gasket and oil filter housing gaskets replace for free, plus the new sensor and turbos.

[kfrazie1]

Originally Posted by 335coupepr

Now, the shop is saying that my oil sensor is bad. They dicided to mesure how much oil was in the car and find out my car had close to two quaters more. F--k, I could off break my seals. The sensor was working improperly, everybody out there that have oil problems, make sure to get the oil out and check it. At least got the valve cover gasket and oil filter housing gaskets replace for free, plus the new sensor and turbos.

The oil level sensor has a very low failure rate and is very reliable. Take a look at efthreeoh 's posts regarding the sensor.

[335coupepr]

Originally Posted by kfrazie1

The oil level sensor has a very low failure rate and is very reliable. Take a look at efthreeoh 's posts regarding the sensor.

I am about to burn my car. After replacing the turbos, valve cover and oil filter gasket, new PCV (BMS) and catch can, plus a new oil sensor, problem continues. I just got the car back from the shop, it had almost two quarters of oil over, so they change the oil sensor. Guess what, after 57 miles the fuc.... car had the oil light on. It went from have to min in the oil gauge. Do I have a bad computer, what the f... is it?

[335coupepr]

well, I checked the car again for any leaks and is , no leaks anywhere. But my intakes valves are gunk big time. Someone mention that gunk valves could consume oil, bad seal. Look at my valves with 40,000, what do you think?

[Whateva]

Gnarly 335coupepr. I'm getting walnut blasting done for my 79k 335 for $695.

[pwr hungry]

Oil consumption on the n54 335 comes from 3 things.

1) leaking gasket somewhere. Causes a visible leak.

2) bad pcv valve or clogged up valve cover pcv passages. Causes excessive oil consumption though intake ports or suction through rear turbo inlet pipe and it goes out the exhaust.

3) bad turbo seals. Causes turbos to leak and burn the oil.

The first two are pretty easy fixes. The third, not so much.

[vase330]

I don't know if am lucky or it is some are unlucky and this is not normal? My car is 50K, it doesn't burn a single drop it seems. Weird because my E46 330ci seemed to burn oil quite a bit, and this E92 been tuned since 10K miles and have never had to add any oil ever. And every time I check its always at max. Am surprised because am FBO and drive around with two cans in the trunk expecting to need it but its going 4yrs since I put those two cans back there and have never needed them.

[djgandy]

Originally Posted by vase330

I don't know if am lucky or it is some are unlucky and this is not normal? My car is 50K, it doesn't burn a single drop it seems. Weird because my E46 330ci seemed to burn oil quite a bit, and this E92 been tuned since 10K miles and have never had to add any oil ever. And every time I check its always at max. Am surprised because am FBO and drive around with two cans in the trunk expecting to need it but its going 4yrs since I put those two cans back there and have never needed them.

Never put a drop in either. Oil always full.

[kfrazie1]

Originally Posted by pwr hungry

Oil consumption on the n54 335 comes from 3 things.

1) leaking gasket somewhere. Causes a visible leak.

2) bad pcv valve or clogged up valve cover pcv passages. Causes excessive oil consumption though intake ports or suction through rear turbo inlet pipe and it goes out the exhaust.

3) bad turbo seals. Causes turbos to leak and burn the oil.

The first two are pretty easy fixes. The third, not so much.

Theres also another cause that I recently saw someone post on n54tech. Bad valve stem seals on the exhaust side causing oil to weep past the seals into the exhaust. This can sometimes be misdiagnosed as bad turbo seals.

[tomkocz]

Do people on this thread who own 2009 335i (N54 engine) find it odd that I need a quart of oil around 5-600 miles with "normal" driving? Some dealers I called say its normal others say it is not. Just need some sane opinions on this.
thanks

[F80Mmm]

Originally Posted by tomkocz

Do people on this thread who own 2009 335i (N54 engine) find it odd that I need a quart of oil around 5-600 miles with "normal" driving? Some dealers I called say its normal others say it is not. Just need some sane opinions on this.
thanks

that sounds pretty similar to my 09' 335i, but I drive hard.

[335coupepr]

Originally Posted by 335coupepr

I am about to burn my car. After replacing the turbos, valve cover and oil filter gasket, new PCV (BMS) and catch can, plus a new oil sensor, problem continues. I just got the car back from the shop, it had almost two quarters of oil over, so they change the oil sensor. Guess what, after 57 miles the fuc.... car had the oil light on. It went from have to min in the oil gauge. Do I have a bad computer, what the f... is it?

Every week a I have to add a quarter of oil. That how bad my car is getting. Went to another shop and told me that the new turbos are leaking. Now I am fighting with the dealer to replace the turbos again.

[kfrazie1]

I would take another look at the valve cover gasket. Mine was weeping a little and I was adding a qt of oil every 1000 miles. I changed the gasket and I haven't burned anything ands it's been 950 miles since I changed it. I think if the gasket is bad it messes up the vacuum in the head.

[MK335i]

I drive my car pretty hard. Typically hit 120mph+ multiple times a week. It will randomly pop up saying I need to add a quart. Dealer has never thought to check anything out or act suspicious when I take it in for a top off (you would think it would be to their advantage to recommend getting it checked out) so I have never really been worried about it. I have 62K on the car.

[iqraceworks]

I know this is an old thread....but I though I would ask a question regarding oil usage.

My 07' 335i has right at 100k miles on it. I changed the oil when I first got it a few months ago....and so far I have put around 2,000 miles on it.

It's been showing right at the max line ever since the oil change, but today I noticed that it's one click under the max line now. From what I've read....from the min line to the max line is 1qt of oil.

So I'm assuming it's burned around 1/4 of a quart in 2,000 miles.

Is that normal usage? Low usage? High usage?

Thanks!

[335e92tx]

Originally Posted by iqraceworks

I know this is an old thread....but I though I would ask a question regarding oil usage.

My 07' 335i has right at 100k miles on it. I changed the oil when I first got it a few months ago....and so far I have put around 2,000 miles on it.

It's been showing right at the max line ever since the oil change, but today I noticed that it's one click under the max line now. From what I've read....from the min line to the max line is 1qt of oil.

So I'm assuming it's burned around 1/4 of a quart in 2,000 miles.

Is that normal usage? Low usage? High usage?

Thanks!

Prob low for most 100K n54s. At least a quart needing to be added in 3K miles common.

BMW lists 1 quart in 750 miles as acceptable regardless of mileage.

M engines are 1 quart in 600miles.

[iqraceworks]

Thanks for the info. Based off of my numbers...it would take around 8,000 miles to burn a quart of oil (1/4 qt every 2,000 miles).....so if 1 qt every 750 miles is "acceptable".....it sounds like my motor isn't burning much oil at all! Good news!

[GooseMSU]

My e92 n54 just seems to be burning oil so much quicker than anyone elses. I'm burning half a quart of oil in 20 miles. Lots of white smoke. Have done compression and leak down test, both came out very impressive. 190 across the board for the compression test and 2% loss for leak down test across the board. I'm nearly positive it's got to be the turbo seals but even if those were bad, would I be burning oil this fast? Is this type of consumption more likely to result in an engine rebuild? Thanks for any help