VR-1 a good choice but only multi grade choices 10W-30 or 20W-50. I’d go 10W-30. Castrol Classic still only 20W-50. Maybe OK for severe duty. I like Brad Penn/Penn Grade 1 for years. They make 10W-40 if you so inclined. I buy a case at a time from a distributor to get a better deal. Driven makes a copy cat oil which is probably OK too. Don’t like Diesel oil in gas motor. That was what was used before ZDDP oil was widely available. Of course, many will swear by Rotella or Delvac.