gas mpg
02-23-2010, 10:37 AM
#2
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Location: Oak Harbor, WA.
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
30x9.50 tires really shouldn't effect your mileage all that much. They're really only a couple inches bigger than stock. I suggest you run a couple bottles of fuel injector cleaner through your fuel system, check out your cap, rotor, plug wires and plugs and replace anyhting that looks questionable. Install a cold air intake and good catback exhaust system. All of that would be a good start to getting better MPG. I am currently getting 18-19 mpg on the Hwy. with 6" lift, 4.56 gears, lockers F&R, 33" tires and a 4.0 HO/AW4 engine tranny combo.
02-23-2010, 11:38 AM
#3
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Year: 2000
Model: Cherokee
Engine: 4.0 high output, Alabama Cylinder head, 60mm bored TB
If you went to 225's it might improve. I have 30's right now and get anywhere from 14.7-15.5 mpg around town. With 225s I got about 16-17 around town and better on the highway.
02-23-2010, 12:41 PM
#5
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Year: 1999
Model: Cherokee
Engine: 4.0
X2 I have very similar findings, I think the wider tire has something to do w/it. No matter what tire you run try to source some Ethanol free gas!! That's good for 1-2 mpgs
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