What RPM should my 4.0 be running at?

[FireJeep]

Read some more of his stuff. That was not a unique situation.

Nah, I can only handle so much ignorance at a time.......

 

[Brian.souhan]

My mountain mileage has always been better than flat highways.

Wow…this is good to know and makes me believe some of the weirdness I’ve seen in some of my driving. I often go DC to Toledo Ohio, and often times have found I got better mileage in the mountains (hills lol) of PA than the flat sections in Ohio. Seriously had me questioning my measurements!