fan330xi said:I needed to add a little oil to my car. Is there any harm to add a little of 15w-50 Mobil 1 synthetic oil to my 3 series?
Yes, this oil is not even close to the correct viscosity for a 330. Thicker is not always better, and as KevinJ_2k1_325ci pointed out, your engine will actually end up working harder and running hotter if you use it.fan330xi said:Is there any harm to add a little of 15w-50 Mobil 1 synthetic oil to my 3 series?
You'll be fine, we overdramatized a bit earlier. 15W-50 is not ideal by any means, but it won't kill your car.fan330xi said:That's the only Mobil1 they had. I only put a third of a quart to top off. Is that really bad?
Should I go get a complete oil change?