Dear Dennis;
Simply drive it conservately the first 2,000 miles using SAE 20 oil, SAE 30 after.
Change the oil after 500 miles then at 1,000. After that, every 2,000 miles or 1 year whichever comes first.
Don't use multi-grade oil (10-30) ever.
The SAE 30 used in diesel trucks works best, as it has the longest lasting detergent action and best flow rate.
You might go to a "truck stop" and see what brand they use.
Good luck.
