I just experienced an $ 3,200.00 lesson in Cummins Diesel Engine Maintenance. I was informed that over filling the crank case plugs up the emissions system. The mechanic said it is much better to keep the oil level a quart low than over fill. I found out that when the engine is hot there is approximately 1/2 quart of oil in the upper part of the engine. When the truck was serviced, they would fill it to the full mark. When I checked in the morning the level was 1/2 quart above the full mark, which got expensive.
They also said that City Slickers like me shouldn't drive Cummins powered trucks. They were designed to work, and idling around town isn't much work. They recommended I keep the transmission in a lower gear and the RPM higher.
I only post this in hopes it saves others a similar bad experience. I suggest anyone with a 2007 or later cummins verify this information with their Dealer. So,,, take it for what's it worth.
They also said that City Slickers like me shouldn't drive Cummins powered trucks. They were designed to work, and idling around town isn't much work. They recommended I keep the transmission in a lower gear and the RPM higher.
I only post this in hopes it saves others a similar bad experience. I suggest anyone with a 2007 or later cummins verify this information with their Dealer. So,,, take it for what's it worth.