Toyota 4.7...nothing can compare, Youtube has documented stories on two 'Million Mile Tundras', both oilfield hotshot trucks.
Diesel? Cat D13000 series, used in gensets, the old D8 2U series dozers, marine engines. I personally maintained at least two that had 30,000 hours on them...that is the equivalent of 1,800,000 miles on them without overhaul.
