And for no particular reason. Weather maybe! Lol
After reading this i would have to say I guess I feel pretty lucky with over 200k miles and nearly 4000 hours it has only reset once "so far"
My 06 6.6 lbz just reset for the first time with 210000 miles and the hours were at around 3500. Now it reads 3.2 hours. Thats irritating to say the least.