[335coupepr]

Ok guys, my car started consuming a quarter of oil (from Max to Min) according to the sensor every 300 miles. First, the turbos were replaced (4 month ago), the problem persist. Then I replace the PCV with the new one from Burger plus the catch can, the problem persist. Then the valve cover gasket was replace, the problem persist, and finally the oil filter housing gasket was replace and some other leak at the oil cooler was fix. After all of that, the car got worst, now it consume a quarter of oil after 181 miles. I figure the sensor might be bad, so I did decide not to add any oil, after more miles on it, the lifter started to sound, I added oil and it got quiet, so it does consume oil. I have no idea, the car does not smoke even at high RPM, no smoke coming out of the exhaust, no leaks, the car works fine. where is that oil going? The only thing I could think is a bad piston ring, but no smoke. What is wrong with this car? Someone with good knowlege in this engine please help me.

[pwr hungry]

If your other three threads didn't answer it for you, I don't know that this one will either...best of luck to you though...does NOT sound like a fun issue to have.

[135Pats]

I'd think if oil were blowing past the rings, you'd have at least one of the following

1. Misfires under heavy load
2. Smoke, lot's of it
3. You'd foul the plug in that cylinder in no time


The rate of loss sounds like an outright leak. Maybe check the oil pan? You've already replaced the gaskets that tend to get brittle in the engine bay. I'd say check the return lines but if you replaced the turbos i'm assuming those were found to be in good shape.

[Fernflex]

Te deje un mensaje

[FEDE/E92]

A mi me paso lo mismo remueve el Intake Manifold y chequea las valvulas. Las mias estaba llenas de porquerias yo las limpie y el carro recobro par de caballos de fuerza y no se desaparece mas el aceite.

[335coupepr]

Originally Posted by FEDE/E92

A mi me paso lo mismo remueve el Intake Manifold y chequea las valvulas. Las mias estaba llenas de porquerias yo las limpie y el carro recobro par de caballos de fuerza y no se desaparece mas el aceite.

Cuanto aceite te estava consumiendo por millaje?

[335coupepr]

Originally Posted by 335coupepr

Cuanto aceite te estava consumiendo por millaje?

How much oil was your car consuming, and did you see any smoke coming out of the exhaust. Thanks

[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?

[Miko226]

Check:

Turbo Seals
Valve Cover Gaskets
Oil Filter Gaskets

In that order

[335coupepr]

Originally Posted by Miko226

Check:

Turbo Seals
Valve Cover Gaskets
Oil Filter Gaskets

In that order

All 3 all new.

[uniter]

Originally Posted by 335coupepr

Ok guys, my car started consuming a quarter of oil (from Max to Min) according to the sensor every 300 miles. First, the turbos were replaced (4 month ago), the problem persist. Then I replace the PCV with the new one from Burger plus the catch can, the problem persist. Then the valve cover gasket was replace, the problem persist, and finally the oil filter housing gasket was replace and some other leak at the oil cooler was fix. After all of that, the car got worst, now it consume a quarter of oil after 181 miles. I figure the sensor might be bad, so I did decide not to add any oil, after more miles on it, the lifter started to sound, I added oil and it got quiet, so it does consume oil. I have no idea, the car does not smoke even at high RPM, no smoke coming out of the exhaust, no leaks, the car works fine. where is that oil going? The only thing I could think is a bad piston ring, but no smoke. What is wrong with this car? Someone with good knowlege in this engine please help me.

What's in your catch-can?

:X Is your oil drain bolt tight?

[335coupepr]

Originally Posted by uniter

What's in your catch-can?

:X Is your oil drain bolt tight?

empty

[335coupepr]

Originally Posted by uniter

What's in your catch-can?

:X Is your oil drain bolt tight?

no leaks at all anywhere and no smoke. 57 miles, have a quarter gone after new sensor, so my old sensor was good.

[uniter]

If your catch can is empty and you aren't burning oil and you aren't leaking oil..... then add another quart and report back how long it took to burn.

If that took 57 miles to disappear it's time to check your coolant, oil and headgasket. Full fluid/filter replace and old fluid inspection.

[joeyt]

So youve taken off your lower engine cover. Theres no obvious leaking? If there is locate it. Do it yourself as some garages are total crap.

Gaskets have been replaced (doesnt mean they were done correctly and could still be leaking, its been seen before)

The oil your engine is consuming is allot to say the least. You may need to drop your downpipes and see if there is oil in the turbos. (Yes they have been replaced but could still be bad)

and an easy way to test for a bad ring is a compression test. Its not hard and wont take long for a good garage to do it.

If none of these things uncover the reason then check your coolant level as it may be going in there although its allot to go in tbh.

Other than that its basically magic. As iv never heard of using that much oil without something obvious being the cause.

Also to add if you use the same garage all the time. Choose another one as if they cant find something using that much oil then they seem pretty sh*t to me.

[335coupepr]

Originally Posted by uniter

If your catch can is empty and you aren't burning oil and you aren't leaking oil..... then add another quart and report back how long it took to burn.

If that took 57 miles to disappear it's time to check your coolant, oil and headgasket. Full fluid/filter replace and old fluid inspection.

I done all that, I going to check how much oil is in the car.Thanks

[335coupepr]

Originally Posted by joeyt

So youve taken off your lower engine cover. Theres no obvious leaking? If there is locate it. Do it yourself as some garages are total crap.

Gaskets have been replaced (doesnt mean they were done correctly and could still be leaking, its been seen before)

The oil your engine is consuming is allot to say the least. You may need to drop your downpipes and see if there is oil in the turbos. (Yes they have been replaced but could still be bad)

and an easy way to test for a bad ring is a compression test. Its not hard and wont take long for a good garage to do it.

If none of these things uncover the reason then check your coolant level as it may be going in there although its allot to go in tbh.

Other than that its basically magic. As iv never heard of using that much oil without something obvious being the cause.

Also to add if you use the same garage all the time. Choose another one as if they cant find something using that much oil then they seem pretty sh*t to me.

yeah, I will measure the oil tomorrow, then take each cylinder compression (I have the compression gauge kit). Last week, the BMW shop change the sensor because the old sensor measurement was in MIN (+quarter), and the car had close to two quarters over (according to the shop), now I got the new sensor and same shit. Tomorrow I will check the oil, if I have the correct measurement, something electrical is wrong with my car. My car have 39,000 miles, like new. Let you know, Thanks

Compression + leak down test. This must be done.

[335coupepr]

Originally Posted by FCobra94

Compression + leak down test. This must be done.

I will, thanks

[335coupepr]

I took my intake manifold off, with 40,000 miles my valves are gunk. Could this be the problem? The garage change the sensor and the oil consumption persists. I checked the car everywhere and no leaks.

[turbs]

No. Thats not your problem. Theres is almost no way that some dirty valves is making your car use oil I'm afraid. You need to do a compression check and leak down test like the two other guys have said instead. That's more than likely where you will uncover your issue.

[JunkStory]

I have heard from two independent members that their oil consumption has been alleviated after cleaning the intake valves. Yes, it is possible that gunked up intake can lead to oil consumption, but don't ask me why..

I am in the same exact situation. My car has about 80k miles, and burning about 1qt of oil ever 300 miles (maybe even less than that). I will try to clean the intake and see where that goes.