What's your MPG?
#47
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Location: New Jersey
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Year: 1996
Model: Cherokee
Engine: 4.0 HO
1996 5 speed 4.0 all stock for now. I get 12.8 MPG driving with my foot on the floor all day. I drive 50/50 with city and highway. I could probably push 14 MPG if I drove it easy, but that just wouldn't be any fun
#48
CF Veteran
average about 12.5mpg. I use my jeep for work and do a ton of slow driving *10mph* which really kills the milage calculations. The surco rack doesn't help any either.
#50
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Year: 9teen98
Model: Cherokee
Engine: 4.0 I6
i stopped calculating my MPG. every time i calculated how much i got from a full tank of gas every fill up or every week, the more i got depressed! haha therefor i just fill her up. problem solved.
#51
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Location: Grand Haven, Michigan
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Year: 1998, 1999
Model: Cherokee
Engine: 4.0
If larger tires than stock are used can the mileage be trusted? The speedometer is off so unless the corrected speedometer gear was installed how are people getting accurate readings?
#52
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#59
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Year: 1998, 1999
Model: Cherokee
Engine: 4.0
Here's an example of how to calculate MPG for Bigger tires.
Re: Calculating gas mileage with larger tires! HELP
Assuming you mean LT325/65R18, BFGoodrich says their AllTerrain has 599 tire revs/mile. Stock LT275/70R18 tires had 629 tire revs/mile.
629 minus 599 = 30
30 divided by 629 = 4.77 percent.
So your speedo, odo, and tripmeter are all slow by 4.77 percent. If you don't want to have the speedo calibrated to 601 tire revs/mile (the smallest number the dealer can do), then to compute accurate fuel mileage, you need to add 4.77 percent to the miles indicated by your tripmeter.
Example:
24.8 gallons of fuel
400.7 miles per tripmeter + 4.77% = 419.8 miles
419.8 miles divided by 24.8 gallons = 16.93 MPG
Assuming you mean LT325/65R18, BFGoodrich says their AllTerrain has 599 tire revs/mile. Stock LT275/70R18 tires had 629 tire revs/mile.
629 minus 599 = 30
30 divided by 629 = 4.77 percent.
So your speedo, odo, and tripmeter are all slow by 4.77 percent. If you don't want to have the speedo calibrated to 601 tire revs/mile (the smallest number the dealer can do), then to compute accurate fuel mileage, you need to add 4.77 percent to the miles indicated by your tripmeter.
Example:
24.8 gallons of fuel
400.7 miles per tripmeter + 4.77% = 419.8 miles
419.8 miles divided by 24.8 gallons = 16.93 MPG
#60
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Year: 1998, 1999
Model: Cherokee
Engine: 4.0
So using that calculator (with the trip computer mpg's) it turns my 15.3 on the trip computer into 16.09mpg accounting for the larger tires.
I still need to do a tune-up so hopefully I'll get mid 16's all around. Around 1mpg better than my last 3 Trucks... Chevy Suburbans! Driven under same conditions on the same routes...
I still need to do a tune-up so hopefully I'll get mid 16's all around. Around 1mpg better than my last 3 Trucks... Chevy Suburbans! Driven under same conditions on the same routes...