Currently running MC 5W30 syn blend and a MCFL400S filter. Finally got to drive the truck last night after replacing the ball joints and the radiator. I noticed at 70 mph, its turning 2600 rpm, and at 75, almost 3000. Is the oil prone to shearing being its turning so high? I was thinking of running Maxlife 10W30 and a Fram Ultra instead. It also has a check engine light for the EGR system, Ill have to take care of that soon. I plan on doing 5k ocis with this truck.