Discussion Starter · #1 ·
Hi so maybe someone can clarify something for me. I know that the vehicle takes 5w-40 oil (6.4l), as indicated on the filler cap and in the service manual. However when I check the tech-authority shop manual for the vehicle it states as a starred "note" that the 6.4L engine should use 0w-40. I can see the 0w for cold weather starts and at that rating it runs like water. I could also see that the oil at 0w would flow that much faster (? than 5w) to the top of the engine. I have checked with the dealer for a reference and they state to use 5w-40. Thoughts.