I have a m3 which have a euro S50B30 engine (288hp) with Accralite pistons. I have been using 5w50 Mobil rally formula1. On hot day (33 Celcius) the oil pressure drops to 1.1-1.2 bar at idle and it lights my warning light (oil pressure warning starts at 1.2bar).
Do you have any suggestion what kind oil to use. I not keen to use 10w60 oil such as Castrol TWS do to the bearing tolerances in s50 engines. Also it rises oil temps quite lot
Do you have any suggestion what kind oil to use. I not keen to use 10w60 oil such as Castrol TWS do to the bearing tolerances in s50 engines. Also it rises oil temps quite lot