Phil99

At what cruising speed in the 4L can you get the maximum fuel mileage?

XJ's~For~Life

My guess is 55-60 and keep it steady as possible not shifting down for uphills. That is how I get the good mileage. The 4.0 will never get good mileage but you know what I mean

OnlyInMyXJ22

4 Low shouldn't be used on the pavement at all...you use 4 Low for torque and power anyways so why are you even questioning mileage...

XJ's~For~Life

I think he meant 4L as in the 4.0L engine

OnlyInMyXJ22

Well time to get the abbreviations for things right then.

If that is the case, then 55-70 depending on terrain. If fuel mileage is huge for people, Honda's are all the rage.

aircruiser

x2 thats why im looking for a daily driver..but not honda..

Phil99

Can i not be curious about mpg or do i have to love how much gas my jeep uses?

aircruiser

you have to love how muxh gas your jeep uses.























jk best bet is to find the happy medium where your rpms are low as can be without constantly having your trans upshif...another advantage i have with my 5-speed. BOO-YAH!!

93XJLI

2300-2800 RPM... slower the better. I get 19-20 on the highway if its flat doing 60.

Mike H.

I get best mpg running at 2300rpm (20mpg)... unfortunately, that's all of 55mph with my gearing and tire size.
At 2500rpm (70mph to keep from getting run over) I knock down 19.2mpg... although I'm sure it has more to do with wind resistance than it does rpm.