The industry consensus on high mileage is 75,000 miles. This is a collection of links on this topic, including an article published by Valvoline and a number of high-mileage motor oil options for the 3.6L gasoline engine.
Articles and Threads on High Mileage Motor Oil
When to Start Using High...
Question for you all and please keep the scope in this thread limited to a stock Rubicon trim (4.10 gears with 33" tires, no lift, no significant exterior mods) - what kind of mileage are you seeing?
My LE (with automatic 8 speed) has about 1200 miles on it. Most of my driving has been city...