RvFNG76 wrote:
Ok less thought of question. What kinds grades of oil does everyone run in their rigs??
My machinist friend in Monterey (built two engines for me) told me to only use Castrol, Valvoline or Kendall, 20W50 in the summer and 10W40 in the winter. He went so far as to tell me that he would void my warranty, if I ran Quaker State or Pennzoil (same company), because they gum up engines. Keep in mind he told me this 25 years ago, and oil technology has come a long way since then. There was a recent article written that quotes Blackstone Labs saying that there really is no difference between the brands. Personally, I run Mobil 1 5W30 in my Z06 and my wife’s BMW 740iL. In my AMC/Jeep CJ-5 I use Castrol 10W30. Whichever route you go, I would make sure to add a good zinc additive, if your engine hasn’t been rebuilt, because older engines need it and newer oils just don’t have the amount needed.
