BMW M5 Forum and M6 Forums banner

What Engine Oil - manual spec vs. Mobile1 0w40? Sorry for the dumb subjective Q.

3660 Views 5 Replies 4 Participants Last post by  mottati
Gents,

First of all, can anyone remind me what the official spec in the manual is? My guess is NOT synthetic, but would like to know. I don not have an owners manual to look up.

Second of all, I run mobile1 0w40 on my E39 M5 per mobile1 website recommendation. I'm in Chicago, so below32F is quite common. That said, it would be nice to keep the same oil in my garage, but if anyone has any reason I shouldn't, or simply because that's not what the car "desires", please let me know.

Please, I know there is no absolute answer to my 2nd question, and I'm open to your opinions and comments. Especially if someone has a BAD example or data on using 0w40 on E34M5. BTW, it is 1991, with 110k miles.

Thanks.
1 - 2 of 2 Posts

· Super Moderator
Joined
·
10,525 Posts
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A93 Safari/419.3)

I run castrol tws, I also think a 0w oil is a bit thin for the s38.
 

· Super Moderator
Joined
·
10,525 Posts
Any idea what the car SHIPPED with? synthetic or? what weight? for NA that is.
owners manual on my 91 US spec car says 15w40, non synthetic. In my 91 'accessory brochure' there is a pn for bmw high performance motor oil, also 15w40.
There is also an approval for "special oils" which you can find out about by calling bmw, so says the manual. Probably M1 15w50, tws, and other synthetics.
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top