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I have a 1997 Jeep TJ Wrangler with the 2.5 engine. It is a 4x4 5 speed with 31" off road tires. It runs smooth and has no high way noise from these tires. It has 4.11 gears and gets onlu about 14-15 mpg combination city/highway. I am going to get another set of wheels with 205/70/R15 road tires to increase my mieage to about 21 mpg. Then when I want to take it off road I am going to put the 31s back on temporarily only. I have read where adding 3 ounces of acetone to ever 10 gallons of fuel adds between 3 to 3 more miles to gallon and is harmless to the engine.

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11y ago
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Q: What is the average mpg of a 1997 jeep wrangler 2.5 liter?
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