Originally Posted By: fdcg27
There was a guy here who used an ILSAC 0W-20 in his e36 328i during the winter in Canada.
I believe he was on Shannow's buddy list.
Since BMWs are not normally bought for their superior fuel efficiency, I'm not sure why you'd want to use a 0W-20 grade oil.
The reports of enhanced fuel economy using very light grades are greatly over-hyped. You could expect an improvement of maybe 1-2% as compared to a 0W-40 grade oil.
Although real, it would be barely noticeable in normal use. You might save .4-.8 gallons over each thousand miles.
I'd stick with the M1 0W-40 were it my BMW.
Yeah man, what you say's the truth. Many people with quite limited notion of mechanics, failing to understanding the basic principles of automotive lubrication tend to promote the use of overly thin viscosities (like 0W-20) with all their powers (and even agression!) without knowing that great part of all this thin oils ups-a-daysy have nothing to do with engine health and longevity. Indeed I'm sure that using an extra thin oil like 0W-20 would save you a quart in 5 000 miles which isn't a reason to get exited too much, but maybe the harm for your mechanics would be more noticeable. Anyway - tree huggers are everywhere - nothing to do.
P.S. A 0W-20 is absolutely incorrect viscosity for a 328 E36 - Shannow's buddy did wrong, so wrong that I even feel ridiculous talking about it.