Roush recommends 10-30 and that the
oil be changed every 3,000 miles or 3 months. I also run the Castrol 10-30.
Side note about
oil. I know a guy who works at Honda Racing and I asked him about
oil. They use off the shelf oil. The brand is driven by the sponsor, but Honda has to validate and approve the oil. Supposedly only one brand of oil didn't pass the test (starts with a Q).