In Reply to: Oil Consumption in M3s-observances posted by Luxo M3 on June 15, 2000 at 10:33:07:
I bought the car w/ 10k miles and put mobil1 15w50 in it. With this oil i was using about 1quart/1500miles.
-Switched to BMW 5w40 (valvoline) at 16K miles. With this oil, i was using about 1 quart every 2500 miles.
-Switched to BMW 5w30 (castrol) and i have not had any oil loss at 2500 miles. THis is with even the hot (temps in the 100s) weather that we have had in the Bay area the past week.
I also think the M3 engine gets tighter as you put on the miles.