Re: long list of approved motor oils
Was the service guy 70 years old? This is an old wives tail. M1 was thinner than most oils of the time and could clean better than most oils 50 years ago and occasionally would find exit points. Very unlikely today.
If he's a young guy, maybe I'm the outdated advisor.
He works for Valvoline and suggested you not use it? WOW!
Last edited by arejohn; Jun 23, 2011 at 11:18 AM.