[Yehia101]

hello there please i would like to ask that my car is burning oil 1 quarter every 1500 miles and there is no leaks just changed oil filter housing my car is 330i n52 engine i searched everywhere under the car and above no leaks and i took the valve cover off also there is no leaks can anyone tell me a solution for this please because i am getting mad

[SilverGSX]

Pull the spark plugs and look at them. That will give you a baseline to determine if you are burning it or if something else is the issue.

[Yehia101]

i looked into them there was no oil outside the spark plugs but they was in a bad condition so i changed them

[Yehia101]

Originally Posted by SilverGSX

Pull the spark plugs and look at them. That will give you a baseline to determine if you are burning it or if something else is the issue.

i looked into them there was no oil outside the spark plugs but they was in a bad condition so i changed them

[STR8-6IX]

try shell 5w40 oil, it will help with burning

[Yehia101]

Originally Posted by STR8-6IX

try shell 5w40 oil, it will help with burning

i am already using 5w40 shell

[Needbmwpartzz]

Originally Posted by Yehia101

hello there please i would like to ask that my car is burning oil 1 quarter every 1500 miles and there is no leaks just changed oil filter housing my car is 330i n52 engine i searched everywhere under the car and above no leaks and i took the valve cover off also there is no leaks can anyone tell me a solution for this please because i am getting mad

Do you mean 1 quart or a quarter on the oil level bar?
I tend to consume about a quarter on the oil bar at the same mileage as you,my engine has always consumed this amount for the last
100 000km without any noticeable deviation.

[Three_thirty_I]

PCV? What's the mileage on your N52?

I know that the older M54 motors used 2 piece oil control rings to reduce internal friction (so that the engines are more efficient), and they tended to wear out prematurely compared to the more traditional 3 piece oil control rings used on the then older M52 motors. So then, what do the N52 motors use for the oil control rings?

Mine still has fairly low mileage for its age, and since I don't do high or even moderate annual mileage, it's hard to say what my oil consumption is - it hasn't drop between services for the last couple of years, but years ago it seemed to be improving as time went on. I think it was something like a litre after doing 10k km or so - previous time it was a litre after doing just over 8k km. Using a thicker oil isn't really solving the problem, so I would try and verify that there are no obvious and dramatic oil leaks. Then try and determine as suggested above whether it is burning oil by removing and inspecting the spark plugs.

[Yehia101]

Originally Posted by Three_thirty_I

PCV? What's the mileage on your N52?

I know that the older M54 motors used 2 piece oil control rings to reduce internal friction (so that the engines are more efficient), and they tended to wear out prematurely compared to the more traditional 3 piece oil control rings used on the then older M52 motors. So then, what do the N52 motors use for the oil control rings?

Mine still has fairly low mileage for its age, and since I don't do high or even moderate annual mileage, it's hard to say what my oil consumption is - it hasn't drop between services for the last couple of years, but years ago it seemed to be improving as time went on. I think it was something like a litre after doing 10k km or so - previous time it was a litre after doing just over 8k km. Using a thicker oil isn't really solving the problem, so I would try and verify that there are no obvious and dramatic oil leaks. Then try and determine as suggested above whether it is burning oil by removing and inspecting the spark plugs.

my car has 75k miles and i just changed the spark plugs

[Yehia101]

Originally Posted by Needbmwpartzz

Do you mean 1 quart or a quarter on the oil level bar?
I tend to consume about a quarter on the oil bar at the same mileage as you,my engine has always consumed this amount for the last
100 000km without any noticeable deviation.

i mean 1 kilo, 1 complete green bar every 1500 mile

[Greyfox]

Is there black residue all over the exhaust tail pipe? If so, you are burning oil.

If not, you have a leak. You said you just did the OFHG? Have you checked your coolant for foam? It is very easy to over tighten the bolts on the OFH and cause a ripple in the gasket and cause a leak one way or the other from oil to coolant.

[Yehia101]

Originally Posted by Greyfox

Is there black residue all over the exhaust tail pipe? If so, you are burning oil.

If not, you have a leak. You said you just did the OFHG? Have you checked your coolant for foam? It is very easy to over tighten the bolts on the OFH and cause a ripple in the gasket and cause a leak one way or the other from oil to coolant.

what do you mean with coolant for foam? i changed only ofh gaskets cuz there was leak then it stops and oil keep burning

[Greyfox]

You have a N52 motor?

Both the coolant and oil flow through the Oil Filter Housing. The seal prevents one from mixing with the other and/or leaking to the outside.

But, if not installed properly, you can cause a ripple in the gasket that will allow oil and/or coolant to start mixing.

If you open/unscrew the coolant lid and find a oily foam substance, then you have the two mixing at some point.

[Yehia101]

Originally Posted by Greyfox

You have a N52 motor?

Both the coolant and oil flow through the Oil Filter Housing. The seal prevents one from mixing with the other and/or leaking to the outside.

But, if not installed properly, you can cause a ripple in the gasket that will allow oil and/or coolant to start mixing.

If you open/unscrew the coolant lid and find a oily foam substance, then you have the two mixing at some point.

i got your point yes there was foam mix between oil and water then it stops after i changed my gaskets

[Greyfox]

Originally Posted by Yehia101

i got your point yes there was foam mix between oil and water then it stops after i changed my gaskets

Well, at this point I would get it the car up in the air and pull the protection panels off the engine area and check the pan gasket and rear main seal areas.

[Yehia101]

Originally Posted by Greyfox

Well, at this point I would get it the car up in the air and pull the protection panels off the engine area and check the pan gasket and rear main seal areas.

i looked at the oil pan no leaks but i guess that is valve gasket cover needs to be replaced some people told me that on my mileage it should burn some oil because i am always driving fast high rpm

[Yehia101]

Originally Posted by Greyfox

Is there black residue all over the exhaust tail pipe? If so, you are burning oil.

If not, you have a leak. You said you just did the OFHG? Have you checked your coolant for foam? It is very easy to over tighten the bolts on the OFH and cause a ripple in the gasket and cause a leak one way or the other from oil to coolant.

there is a black color on my tailpipes

[Greyfox]

Originally Posted by Yehia101

there is a black color on my tailpipes

Some is normal, a lot is not. But if you clean them and they get coated fairly fast then you are burning a fair amount of oil.

[Yehia101]

Originally Posted by Greyfox

Some is normal, a lot is not. But if you clean them and they get coated fairly fast then you are burning a fair amount of oil.

ok i will try this thank youuuu

[Yehia101]

Originally Posted by Greyfox

Some is normal, a lot is not. But if you clean them and they get coated fairly fast then you are burning a fair amount of oil.

today i put stp oil stabilizer and oil is oki now no burning nothing

[BuildAndDrive]

If your n52 is burning alot of oil, I agree with the comments above to check the plugs. You should have one that is carboned up worse than the others. My car was DRINKING oil at about 1L/300kms but still had good compression... so I tried everything to fix it (seafoam cylinders, oil stop stuff etc) but nothing worked. You have two choices, fix it or sell it. I eventually ended up rebuilding the engine, I made DIY videos on this on my channel if you're interested.

[falwakeel]

Originally Posted by Yehia101

today i put stp oil stabilizer and oil is oki now no burning nothing

Hi there
Maybe this old, but wanted to find out how your car performed? Are u still burning oil? My car has exactly your car symptoms and I am really tired of it

Is this the product you used?
https://www.stp.com/products/oil-additives/smoke-treatment

Thank you