gas mileage lifted xj
01-30-2011, 02:36 PM
#17
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Year: 1996
Model: Cherokee
Engine: 4litre
96 4.0l H.O. w/ 5speed manual stock gears and 31's and no lift, the last tank i got 17.5 mpg. My commute is 38 miles, a mix of city and hwy driving.
keep in mind I try not to get in a hurry, cruise control at 60-65 on the hwy, try to keep the rpms under 2k in town.
if i drive around like speed racer i would get terrible gas millage, you wanna get better gas millage just slow the hell down
keep in mind I try not to get in a hurry, cruise control at 60-65 on the hwy, try to keep the rpms under 2k in town.
if i drive around like speed racer i would get terrible gas millage, you wanna get better gas millage just slow the hell down
01-30-2011, 02:41 PM
#18
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Year: 2001
Model: Cherokee
Engine: 4.0
i run 245/70/16's and it depends on my driving conditions but on highway in summer perfect conditions i get about 320 miles to the tank. I have a K&N airfilter, a 10horsepower chip, the downside of this is i have off-road skid plates everywhere 3" lift skyjacker lift kit( increased weight), off-road bumper with tire carrier, brush guard and step sides. I think i am pretty fortunate.
01-30-2011, 02:49 PM
#19
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Year: 1999
Model: Cherokee
Engine: 4.0
im sittin on a 6.5" lift and only 31s getting about 240 to a tank. the jeep is fairly new to me but i betchea if you went in and cleaned the gunk out from your injectors, valves, tb, and your oil pan you would probably see significant gass milage and throttle responce improvements. im going to clean out everything when i come back from basic/techschool in the airforce. i probably have to drive across the US. when the time comes im going to post mpg in my build thread. just to keep track of it myself.
01-30-2011, 02:52 PM
#20
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Year: 1999
Model: Cherokee
Engine: Golen 4.6 Stroker, AFE Headers, 62mm TB, 24 LB Injectors, Brown Dog kit, HF Cat, 3" Exhaust
and that's in a 4.0L jeep??? i don't even see a diesel on 34s getting that much... sounds to me like you were misinformed.
12 mpg is pretty bad on 31s.
here's a quick breakdown of mine
1. 1999 XJ auto, 4.5" lift, 31x10.5, aluminum wheels, 63mm tb, ev6 injectors, k&n filter, apn header, high flow cat, flowmaster 44, fresh tuneup, properly balanced and aired tires, 120lb speakerbox, about 70lb in tools and accessories... best mpg was 23.5 on all highway driving at steady 55mpg, no passengers, outside temperature right at 70 degrees, windows up, no AC running, fairly flat the whole trip, elevation about 600ft. above sea level, no rest stops for about 340 miles... average mpg is about 18-20 for 70highway/30city in summer, about 17-18 in winter, around 14mpg if driving city only.
2. 1997 5-speed, no lift, 30x9.5, aluminum wheels, ev6 injectors, bad cat. converter, sagged rear. best mpg 24 on a 100 mile highway trip, avg speed 60 mph, outside temp about 50deg., up and down terrain.... usual highway mpg is about 21-22. regular city mpg is 14, that's starting in 20 deg. weather, no warmup, 2 mile drive in city at 30-35mph average.
12 mpg is pretty bad on 31s.
here's a quick breakdown of mine
1. 1999 XJ auto, 4.5" lift, 31x10.5, aluminum wheels, 63mm tb, ev6 injectors, k&n filter, apn header, high flow cat, flowmaster 44, fresh tuneup, properly balanced and aired tires, 120lb speakerbox, about 70lb in tools and accessories... best mpg was 23.5 on all highway driving at steady 55mpg, no passengers, outside temperature right at 70 degrees, windows up, no AC running, fairly flat the whole trip, elevation about 600ft. above sea level, no rest stops for about 340 miles... average mpg is about 18-20 for 70highway/30city in summer, about 17-18 in winter, around 14mpg if driving city only.
2. 1997 5-speed, no lift, 30x9.5, aluminum wheels, ev6 injectors, bad cat. converter, sagged rear. best mpg 24 on a 100 mile highway trip, avg speed 60 mph, outside temp about 50deg., up and down terrain.... usual highway mpg is about 21-22. regular city mpg is 14, that's starting in 20 deg. weather, no warmup, 2 mile drive in city at 30-35mph average.
01-30-2011, 03:10 PM
#21
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Year: 1986
Model: Cherokee
Engine: 2.5L swapped to 4.0
My xj gets 300 to the tank its on 5.5 inches of lift and 31x10.50s it also running no cat a cherry bomb exhaust and a k&n cone filter also i do 80 on the freeway and get that mileage i feel bad for you guys who are only getting 240 doing 55
01-30-2011, 08:04 PM
#22
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Year: 1992
Model: Cherokee
Engine: 4.0 I6
Some will mock me and say I'm lying but once on a road trip from flagstaff AZ to St George Utah I got 300 miles to a half tank. Was really weird but I'm sure of it. Looks funny on my mileage app. Got 400 miles on that tank. Was on my 225 75 15. Speed limit was 55 so I set it to that on the cruise for 6 hours. If I ever go to flag again ill stop at that gas station for sure. Summer blend as well. Lots of stuff add up to good mileage.
01-30-2011, 08:43 PM
#23
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Year: 1992
Model: Cherokee
Engine: 4.0
you guys know that your if you havent regared or changed your speedo gear your calulations are off right? the od doesnt read right.
also for anyone getting 10-12mpg in a pre 96 xj. change your 02 sensor. it will make a a hell of a difference and its only like 45-60$
also for anyone getting 10-12mpg in a pre 96 xj. change your 02 sensor. it will make a a hell of a difference and its only like 45-60$
01-30-2011, 09:17 PM
#24
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Year: 1992
Model: Cherokee
Engine: 4.0 I6
Originally Posted by posjeepxj
you guys know that your if you havent regared or changed your speedo gear your calulations are off right? the od doesnt read right.
also for anyone getting 10-12mpg in a pre 96 xj. change your 02 sensor. it will make a a hell of a difference and its only like 45-60$
also for anyone getting 10-12mpg in a pre 96 xj. change your 02 sensor. it will make a a hell of a difference and its only like 45-60$
01-30-2011, 11:06 PM
#27
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Year: 2001
Model: Cherokee
Engine: 4.0 L I6
I get 16-17mpg and I have the correct spedo gear. I have 33x12.5x15's, 5.5" lift, and 4.56 gears. I have other random stuff though: flowmaster catback exhaust, neon injectors, tb spacer, cold air intake.
01-31-2011, 12:26 AM
#30
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Year: 2000
Model: Cherokee
Engine: 4.0L
plug in your tire size and gear of choice and see rpm at your highway speed.
http://www.ringpinion.com/Calc_RPM.aspx
i get about 15.5mpg, with about 250miles to the tank. my speedo is not corrected to the 32 inch tires. before i upgraded injectors i would get about 240 ish a tank... all on a fully rebuilt engine.
http://www.ringpinion.com/Calc_RPM.aspx
i get about 15.5mpg, with about 250miles to the tank. my speedo is not corrected to the 32 inch tires. before i upgraded injectors i would get about 240 ish a tank... all on a fully rebuilt engine.