Gas mileage

[IndyXJ]

I was wondering what everyone's gas mileage is, but please give additional info as in gearing and tire size and if AT or manual. If it's easier by stating total miles in a tank, that is fine too.
On my truck(4.7l) with city driving, I get about 15. With interstate, 17 or so, sometimes slightly higher.

1.Auto/Manual and TYPE of Jeep(TJ,XJ,MJ)
2.Gearing/tires
3.JEEP type and gastank size if known.

AT/XJ 3.55/35"s and I think a 19Gal tank. I'm roughly guessing 12 mpg right now.

[BillM]

TJ/33's/3.07's/15 gallon tank/and I get around 15 mpg

[IndyXJ]

Is that manual I predict?
I'm wrangling with gas prices just being too much to maintain the Ram forever, but might feel better if it was in a stock YJ/TJ that I wouldn't wheel(or very hard). However, I still owe a little more on the truck than what it's worth... /ubbthreads/images/graemlins/frown.gif

[BillM]

Yeah it is a manual.

[Dennis]

I measured a tank of gas on a 150 mile freeway trip yesterday. I got 18.1. This is an Unlimited Rubicon 6-speed. The manual should do somewhat better than an auto, but the Rubicon package adds bigger tires, lower gears, and about 350 pounds. None of those are helping.

Negative factors: I had two people and lots of luggage, vehicle has only 500 miles on it.

Positive factors: all freeway driving, relatively level, light wind, speeds 60-65 mph (still being broken in).

[Jefferson1964]

Unlimited Rubi Auto, larger gas tank...3K miles averaging 16 mpg....I seem to get better mileage in town as there has been lots of wind last 2 months which seems to really bring down the MPG on the highway.....

[Dennis]

A head wind can make an absolutely huge difference in a vehicle of poor aerodynamics. A 10-15 mph wind doesn't feel very strong, but, at freeway speeds, it is the same as driving 10-15 mph faster. At highway speed, the bulk of the engine power is only overcoming wind resistance.

I found this out twenty years ago when I had a VW bus.

[gmbtj]

So true Dennis. To much wind resistence in a Jeep. On long drives, I air up to about 36 psi for as little rolling resistence as possible, and try to stay about 30 feet behind the fast moving truckers, because they help you out quite a bit with both gas milage and keeping up at speed.

[gmbtj]

by the way, I usually get about 14 to 16 mpg with a manuel 4 banga wrangla with 4.10 gears.

[mtngal]

The Unlimited (stock with 30" tires, auto) has been getting 17 something to 18 something, almost all highway, it's our daily driver. This past weekend we drove to Vegas in the dark, rainy, standing water occasionally on the road. Does it ever hydroplane (OK, there's 35000 miles on the tires and I'm starting to think about replacing them), so we drove much slower than normal, like about 55 instead of 65. The section we normally get just over 19 (Frazier Park to Yermo, highway and all downhill) we got just over 21! That additional 2 mpg continued on the next section (Yermo to Vegas, then a bit in Vegas) before going down to just above 17 - we drove home in a strong headwind.

The Sport gets about 2 mpg more if you keep it between 60 and 65, and it now looks like the Unlimited's better mileage point is 55 to 60.

[IndyXJ]

So basically I'm learning a Wrangler, even a manual, isn't much better gas mileage wise than my Ram. Thanks everyone for their input!

[Fred]

**** you guys are doing good! I have a 99 sport 4L, with 2" lift, 265/75/16 mud terrains(32's), automatic, soft top, it has 3.07 gears, and get around 12-14MPG. I do not drive it regular. For added weight I have of corse the tires, full size spare, rock crawler warn style rear bumper.