What is everyone's opinion on high octane gas in power equipment? Do you think it lengthens the life of the engines or hurts them? Is it really 20 cents/gal better? I had a friend who hauled gas to service stations and he told me, before he was killed, he pumped the gas into the truck from the main terminal and when he reach the station he poured a little can, about 1/2 pint, per 500 gal for mid grade and 2 cans for hioctane. But the Amaco hioctane IS SUPPOSE to be cleaner. I don't remember where it came from, but ALL of the other main oil companys (BP, Exxon, Chevron, etc) pumped the gas out of the SAME terminal!