" From: Matt Haas <mhaas@xxxxxxx> " " " Mobil 1 has a huge " amount of detergent in it and is probably why your oil is so dark. That " will clear up after a few oil changes but I would not use a synthetic " oil on your motor until you rebuild it. The reason for that is it will " clean up all of the sludge that is preventing oil leaks. BTW, you'll " need to change the oil using normal intervals until it clears up if you " stick with a full synthetic. some types of synthetic - diester, which mobil 1 was in the beginning at least - are naturally detergent, so they might be counted as 'all detergent'. i've heard the same argument about sludge and leaks against using an oil flush, but when i tried 'gunk' brand the first time - on an 15 year old ex-fleet american with 4000 miles showing - my oil consumption went -down-, significantly. it pulled a ton o' sludge out of the engine too. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list