I have run 15w40 Rotella since day one in my 18 wheeler. 1.25 million miles so far. Only internal maintenance was a head gasket. I'm vary happy with using Rotella.
Paul Visk Belleville Il 618 406 4705 I had a friend that worked for the city doing auto maintenance. tons of engine rebuilds on the police cars and he swore by Rotella. The fact that it is sold in gallon jugs so they are easy to fill back up to get rid of the old oil is nice too.
