What kind of oil should i put in my 1990 535i M30 Engine?

[Bill R.]

all this oil B.S. posted here by people who have never even seen a main bearing up close or a crankshaft for that matter that i'm not going to post on this subject anymore. I don't sell my customers anything, i ask them what oil they use , or if they have a preference.

can i do the honors of summing this crap up for everybody?


(all of this is IIRC)
winfred's shop (in humid, hot louisiana) will sell you
10w40 for an m50 or m60 (multivalve)
20w50 for an m20 or m30 (2 valve)
20w50 for an m70

bill will recommend/sell you (in hot, dry arizona)
0w40 (mobil 1) for m20, m30, m50, m60
0w50 (") if you can get it

significant number of USians on board who use syns use mobil 1 0w40, mobil 1 15w50, mobil 1 5w30 in that order.

significant number of USians on board who use dino use:
20w50 for m30
10w40, 20w50, 5w30 in that order for m50
'' m20
'' m60

manual says (for SG, 1989 technology oils)-DINO
approx 5w30 for max 60 deg F ambient temps
approx 10w40 for between 60-80 F ambient temps
approx 20w50, SAE40, SAE 50 for 80+ F ambient temps

[winfred]

yea this is sorta like bosch platinums and what coolent do you use

all this oil B.S. posted here by people who have never even seen a main bearing up close or a crankshaft for that matter that i'm not going to post on this subject anymore. I don't sell my customers anything, i ask them what oil they use , or if they have a preference.