Volvo trucks are built to go beyond 1 million miles. Transmission and rear axle warranties are five years or 750, 000 miles which ever comes first. When traveling, we normally remain hitched to the trailer, and don't bother with putting the trailer jacks down. The average time to in frame overhaul on the M 11 engine is 800,000 miles, and thats towing a gross weight of 80,000 pounds. Some M 11s go to the million mile mark before requiring an inframe overhaul. This engine has only 493,000 miles on it. It is tight and does not burn oil. This engine should easily go 300,000 more miles before requiring an inframe overhaul.
I change the oil and filters every 6 to 8,000 miles. I lube the truck every 3 to 4000 miles.