[Pbforlife254]

Changed my oil 300 miles ago and oil sensor is already down to 3/4. Is this normal for my car to go through this much oil at 95,000 miles? No oil visable on engine bay. Valve cover recently changed as well. I feel like the car goes through a lot of oil.

[MightyMouseTech]

Are you sure you put in enough oil?

[Pbforlife254]

Yes it was at max

[GuitarDTO]

That's a lot of oil to be going through. You don't smell it, or see it on the ground? Mine wasn't even going through that much, just a quart after about ~3 months, some drops on the ground....and I had 4 oil leaks, Oil Filter Housing Gasket, Valve Cover Gasket, Oil Pan, and now the Turbos supposedly. I've fixed the OFHG and VCG and am seeing how bad the leaks are.

[Fundguy1]

Probably one of the above leaks. Very common. And he listed them in order of most to least common.

[Rickygst]

have you replaced the Blow By hose. It seem to have help me when my car was burning oil, although not as bad as what you are seeing.
https://www.ecstuning.com/BMW-E90-33...w_All/ES19642/

[Pbforlife254]

Nothing on the ground or oil smell really....when I did the valve cover gasket I also changed the oil filter house gasket as well.

[robthewrench]

Originally Posted by Pbforlife254

Changed my oil 300 miles ago and oil sensor is already down to 3/4. Is this normal for my car to go through this much oil at 95,000 miles? No oil visable on engine bay. Valve cover recently changed as well. I feel like the car goes through a lot of oil.

If the visual sensor is down to 3/4, that means you are ~1/4 of a quart low. DO NOTHING until the sensor requests you to add a quart. That visual graph is not like the mechanical dipstick that is showing the full depth of the oil pan. It is only showing you the drop until you need to add 1 quart.

Am I mis-reading your post? You say you feel like you go through a lot of oil. If you are changing the oil at some mileage interval (5K, 10K, 15K) how many quarts does the system request you add before you reach the mileage interval?

[Pbforlife254]

Originally Posted by robthewrench

If the visual sensor is down to 3/4, that means you are ~1/4 of a quart low. DO NOTHING until the sensor requests you to add a quart. That visual graph is not like the mechanical dipstick that is showing the full depth of the oil pan. It is only showing you the drop until you need to add 1 quart.

Am I mis-reading your post? You say you feel like you go through a lot of oil. If you are changing the oil at some mileage interval (5K, 10K, 15K) how many quarts does the system request you add before you reach the mileage interval?

Correct 1/4 of a quart low. When it first dropped to the 3/4 level it was about 300 miles into the fresh oil change. I am now around 520 miles and still at the 3/4 mark. I just feel like 1/4 of a quart in that low of miles is a lot of consumption.

[robthewrench]

If it continues to consume oil, like another 1/4 quart in another 300 miles, you probably have either a small leak or a small consumption issue. Burning 1/2 quart to 1 quart every 1000 miles is more than I would like either.

I don't trust the sensor 100% and sometimes I think any variation the sensor reports is just the sensor and not the true amount of oil in the system.

At least you have a system that warns you when the engine is 1 quart low.

[Pbforlife254]

Originally Posted by robthewrench

If it continues to consume oil, like another 1/4 quart in another 300 miles, you probably have either a small leak or a small consumption issue. Burning 1/2 quart to 1 quart every 1000 miles is more than I would like either.

I don't trust the sensor 100% and sometimes I think any variation the sensor reports is just the sensor and not the true amount of oil in the system.

At least you have a system that warns you when the engine is 1 quart low.

I am not a fan of the sensor at all. When I did my oil change, the bar was drained down to 1/4 so 3/4 quart low. When I drained my oil my 7 quart pan was almost full with oil. Probably right around the 6.5 mark

[Pbforlife254]

Slid some cardboard under my car for the night to see if any oil was dripping and no signs of it doing so...