What oil?

a synthetic oil like Torco would be a good choice. Synthetic oil won't break down as quickly as regular oil does plus a 10-30 synth will stream like a 5-30 regular oil. Of course synth oil is 2x what reg oil is so you'd have to use your judgment there.
What I do is run Torco 10-30 and change my filter every 2k miles and drop the oil every 4k. Just my .02
Most of all BUY USA!!!