Any VOAs run on them? I just bought a 5 qt jug of M1 HM 10w30 at Wally's. It will be replacing the PP in my 88 IROC Camaro which has 160k on the clock, as soon as the PP needs changing.
Just bought the HM 10W40 to compare against the old T&SUV 5W40 (supposedly same as Delvac 1) on my '95 BMW 525iT. Won't have a UOA until next year, though.