m42 oil weight

[mkodama]

also so what is the opinion on synthetic and dino? yeh or ney. i've heard so many sides to it. my first introduction to bmw so im not sure what to use.
i know in my older cars i just stik with dino oil

Synthetic is better in every way.

[e30love]

do you have any leaks right now? if so don't use synthetic

[BBY1104]

It is not in the Bently because that Engine is covered in the e36 manuel. I recomend you get an e36 manuel because it is an "e36" engine. All the motor stuff for the 318is is most likely not in the Bently, except fuses, relays, lights, and generic stuff.

Oh and I use 10w40, my dealer said that was perfect for the climate and location

[Justinian]

I use synthetic only because that is what I've been using since I had the engine rebuilt (new rings, bearings, seals, etc.) on my 318is.

In my E24 I use dino oil since that engine has not been run on syn. according the previous owner.

[strad]

I run synthetic 10W40 (have since I bought the car 12k miles ago). I do not currently have any oil leaks. I did have a giant one from the filter housing, but that can't be blamed on running synthetic oil -- that was a 17-year-old o-ring failure lol.