i have 280k miles on my I6, how much more life?

[robbieyukon]

anyone have more than 280K? i've been using MILITEC oil additive and its awesome. check out www.laniganperformance.com and www.cleenboreusa.com (supported by U.S. military and nasa)

they have all types of of oil for motors and firearm cleaning. if anyone decides to try some let me know so i can get a smoking deal for you. great stuff.

 

[Dr. Dyno]

If your engine isn't burning large amounts of oil, doesn't make any bad noises, and still runs well, it could still last another 100k miles with some TLC before needing a rebuild.
The 4.0 is a gruff, noisy old beast but it's as tough as nails.