The way it was explained to us seems almost the opposite. Some of the newer trucks in the system have accumulated to many miles too quickly We were told 2011 trucks were going out and 2010s with lower miles were coming in and the guys on the longest runs were going to be running the 2010s. Manager said the company gets a tax credit of some kind to trade in the older units and they want to run the hell out of 'em before that happens. Back in 09, Our top guy was assigned an old '98 (came in as a tractor swap) on a 500+ mile run while 04 and 05 tractors were parked in the corner of the yard to slow the mile accumulation. Manager also told us after the swaps, there will be some newer trucks they will try to only use for city to also slow mileage increase.
Oldest truck put to the longest run