I was very pleased with the mileage overall, especially for a 30 year old truck with this many miles. As a little update I've since rolled 322,000 miles. This week I'll be switching the rear differential from a Detroit Locker (ratcheting style automatic locking differential) to a Detroit True Trac (Eaton) which is a Torsen type differential. The Detroit Locker has been in the truck for the last 60,000 and although it works exactly as it should, I've grown tired of its inherent driving quirks and sadly I don't use the truck off road enough anymore to justify it for daily use. Since the entire third member is removable on a Toyota axle much like a Ford 9" or Chrysler 8 3/4" I will be rebuilding a spare with new bearings and the TrueTrac and swapping the entire assembly. For one it reduces down time, also it leaves me a complete third member complete with Detroit Locker and 60,000 miles on the bearings to swap back in should my opportunity to drive off road changes in the future.