Another good reason to use higher octane is because most all "Premium" gas has additives that do a world of good for your motor. It definatly wont hurt to use it unless you don't want to shell out the cash for it in which case 87 will do just fine.[/QUOTE]
If it's additives that steer you toward more expensive Premium Grades, follow the link, or search for Top Tier Gasoline and stick to companies that meet the standard.
http://www.toptiergas.com/index.html