I always run Valvoline oil in my vehicles, as I talked to an ex-military guy a decade ago who was involved in viscosity tests for military vehicles. He felt that Valvoline (at the time) was the best stuff out there. I currently run 10W-30 Max-Life (for older motors) in my '82 Scrambler.
My question is in regard to what I should run in my '76 Cherokee Chief. It has a 360 that runs pretty hot (similar to everyone else's FSJ
). It has 110K miles on it. Approaching the first oil change since I bought it, I'm wondering what grade motor oil I should run given the high temps. I'm looking for oil that might not break down as quickly in high heat, but I'm no expert on this topic. I'm sure someone here has some input, though.