I assume you're looking to buy one. From a Jeep owner: There's no such thing as too many miles. The 4.0L I6 can last around 300,000 - 400,000 if taken care of, and the 2.5L I4 around 250,000 - 300,000. Look for oil around the back, and listen for noises from the engine. If it sounds good, is clean and was taken care of, you're probably in the clear. In Jeeps, the odometer is really more of a scoreboard...
4.0, about 15 MPG, less if the motor has high miles.
A 1995 Jeep Wrangler needs approximately 6 quarts of oil for an oil change.
16 miles
That number has not yet been determined
in a range from 20 to 17
The 2014 Jeep Wrangler has 24 valves.
The 2005 Jeep Wrangler has 16 valves.
The 2004 Jeep Wrangler has 16 valves.
The 2009 Jeep Wrangler has 12 valves.
The 2008 Jeep Wrangler has 12 valves.
The 2006 Jeep Wrangler has 16 valves.
The 2001 Jeep Wrangler has 8 valves.