What Oil Should You Run in a Willys CJ-2A? (The Go-Devil Guide)
My son recently picked up a 1946 Willys CJ-2A, and naturally one of the first questions out of the gate was: What oil should I use? Simple question, right? Not so fast. The internet will give you 47 different opinions, two forum arguments, and a guy who swears by bacon grease. So I did the research, dug through the forums, checked the original Willys service manual specs, and put together the definitive guide so you don’t have to. ⚠️ Disclaimer: