I agree with Talltom - Mobil 1 15W50 is the only thing to go into my 325e 's crankcase. 128k miles and she still does 85mph in 3rd without a problem. Mark Fiumara BMWCCA #37523 Arlington, VA 1985 325e, 128k miles, red Koni's and black Yoko's! Still smoking them on the 495 outer loop to 395N ramp!