I run regular rotella 15-40, but the motor is rebuilt and has aftermarket cam, so I do it for the extra zinc. For yours, what willey-mo said.
You can run the high mileage oil - it's usually no more expensive.
And Walmart brand oil is actually not bad..... just sayin
"Roads? Where we're going we don't need roads." -- Dr Emmett Brown
"When this baby reaches 88 miles per hour, you're gonna to see some serious sh
73 Wagoneer - 4.6L Stroker (yeah baby!!) t176/d300, 3.73's, 33" muds, 4"spring lift, 2" body. Offy dualport w/ Quadrajet, pertronix, flowmaster.