I've been running 93 octane in my 800 since I bought it 3 weeks ago. That's what my dealer told me to use, and I also used it in my Nomad. I read the post about Sea Foam, and there was a lot of discussion about octane ratings, and how 87 seems to be the best. I thought I'd take a poll of who's using what, and how it's working for you. I plan to switch to 87 on my next tank.