I've been needing to ask for what oil anyone might recommend for an 82' 633csi? (or any similar e30 engine) I live in the pacific northwest so the climate is moderate at around 40-50˚f year-around for the most part. The owner's manual suggests either a 20w-50 or 15w-50. I haven't had the car long and I'm not sure what oil was previously used. Any ideas?!
One starter choice is between full synthetic, a synthetic/non-synthetic blend, or straigh ol' non-synthetic. I use this in my M30 engined E34 - http://www.amsoil.com/shop/by-produ...an-car-formula-5w-40-synthetic-motor-oil-efm/ Mobil-1 seems to be a popular choice, you hear it mentioned quite often. I haven't used standard non-synthetic in years, although I suppose Castrol or Castrol synthetic blend might be just fine; haven't looked into it though.
M30 engine. Yes. Run what the manual says. Lots of people recommend oils with high ZDDP - whatever that is ...
