Search engine....?
:agree: b15philly.....the search engine would turn up at least 20 hits. There is a thread right now, being discussed on the octane rating.
All skis have a minimum requirement of 87 octane, except the SC 4-TEC engine.
The octane rating is a "minimum" requirement. If you wanted to use 89 or 91, then it would probably not make a lot of difference in the newer skis, or one that has been using it for a long time. But, the older 687, 657, 717 engines would do better to run the lower grade octane.