1996 spor, 4.0, 33's, 4.10's, locked out back, full exhaust, leaky header, 70s, 60mm t-body, dukie cowl snorkel, IAT relocation,taurus fan swap.

16-16.5mpg

shes getting a top end over haul soon

ported head, roller rockers, gasket matched 99 intake, borla long tube header, milled.010 off the head, performance head gasket, new lifters, new push rods, performance valve spiring, full valve job, flow kooler water pump

 

I didn't read every post so maybe this been said before.
But it seems many people don't know how to calculate fuel mileage.
You need to know your odometer is correct or use GPS.
Fill it up. Write down mileage. After it's 1/4 tank or so, fill it again. Write down mileage. Divide gals used into miles driven.

 

15.6 highway 4.0 232,000 mi. AW4 NP231. 4.56 gears/Lockers/33x12:50x15" Tires/Winch/Bumper/Swing Out Tire Carrier/Roof Rack/Cargo Area Heavy Loads 200#+-.

 

Gas data on my stocker

 

2001 XJ sport, 24 hwy, 21 city. We don't use huge tires, and everything is stock. And we stay off the skinny pedal.

 

1996 SE 4.0/manual RWD, currently averaging between 15 and 16 mpg on a 60/40 mix of city/highway driving. Drivetrain and tires are currently stock.

It'd probably be better if I could resist that 3rd gear downshift for overtaking.

 

1997 XJ. 4wd. 6.5" lift. 35x12.5x15's. 4.0 Auto. Geared to 4.88. 16mpg city, 18mpg highway, normal driving.

In process of dropping a 4.6 stroker. Will post post install numbers when it's done.

 

98' XJ 4x4 with auto trans.
2'' add-a-leaf with 30'' bfg's, everything else is stock.
Rebuild trans and PU front bushings
9 to 10 MPG

 

I have a 91 with 210,000miles I have removed all ac stuff I run dual electric fans, 185 t-stat. cold air intake full exhaust no cats. neon injector upgrade. with 3.73s 4.5 inches of lift with 33x12.50s. msd distributor cap and rotor and 8.5mm wires with ngk v power plugs and msd ignition coil. I get 17.5 mpg but I accelerate easy and don't go over 65.

 

Same here. I love the look of surprise when other cars try to cut me off and I have more than enough power to leave them behind.

Kills the mileage but feels so good.

 

Why is this in tech?

 

1999 4x4 with just over 188,000 miles consistently getting 18.2 to 18.7 mpg, 19 if I really pay attention and cost down hills, around town, speed range of 30-55mph.


I seldom drive the jeep notable distance on the highway but last 1+ hour highway trip was 20.2 mpg

 

2004 GC, currently getting 17 in city. mods; k&n "cold" air intake, Borla cat back exhaust, and just put in 784 injectors. running 245/75R16 Perrelli scorpion at's. when I get more data on the new injectors i'll post it.

 

I get 9 mpg in a stock 2000 XJ on 31x10.50x15 with a straight pipe from the cat back

 

Back in June, I drove my '96 (3.5"lift, 31x10.50's, stock 3.55 gears) from Denver to Northern California, loaded with about 1000 lbs of gear in the back, towing a trailer with my motorcycle on it.
It was 2,600 miles round trip, and I averaged 16.5mpg for the whole trip.
One leg was as low as 13mpg, and a couple were around 18mpg.........