Poor Gas Mileage (2005 4.0 Automatic)

[Apparition]

That's right at what to expect if your 05 4.0 auto is pretty stock. In fact, 14 was the govt combined rating for that rig when it was new:

https://www.fueleconomy.gov/feg/bymodel/2005_Jeep_Wrangler.shtml

As has been said, a TJ has the aerodynamics of a brick. Also, drivetrain HP loss vs HP rated at the crank is on the order of 30%, dyno proven for mine and others like @Jezza. These vehicles have many worthy attributes, but fuel efficiency is NOT one of them.

I was looking at my window sticker an hour ago, 2006 LJ

 

[Woodrow]

I was looking at my window sticker an hour ago, 2006 LJ

View attachment 637730

Besides coasting downhill with engine off, ever gotten 19?

 

[Apparition]

Besides coasting downhill with engine off, ever gotten 19?

I did get 17 shortly after I bought on a road trip, but it came with a set of JK 32's.

I pretty much plan on 10 mpg now. I usually get better but not always. I shouldn't run out of fuel that way.

 

[Woodrow]

I did get 17 shortly after I bought on a road trip, but it came with a set of JK 32's.

I pretty much plan on 10 mpg now. I usually get better but not always. I shouldn't run out of fuel that way.

I got 15 with my 4.0 on 31s. 13 with my stroker on 33s and now 12 on 35s. At least it didn't really change when I went from 4.11 to 5.13 gears!

 

[Apparition]

I got 15 with my 4.0 on 31s. 13 with my stroker on 33s and now 12 on 35s. At least it didn't really change when I went from 4.11 to 5.13 gears!

It's a lot flatter where I drive.

 

[leon jones]

"JEEP" ... great little utility vehicles w/ aerodynamics of a falling brick that get s...ty gas mileage !

leon