>Also, what about a synthetic, like Mobil One or Castrol R ??? I was wondering about synthetic oil also. I've only got 60 miles on my rebuild on the '55 DeSoto. As I recall back in the ol' days, sludge in the valve covers was a big problem. This engine had about 20# of it before rebuild. Anyways, would synthetic help? --Roger van Hoy, '55DeSoto, '42DeSoto, '66Plymouth, '73Duster, Washougal, WA |