I agree, but keep in mind the older engines were built and books written
when unleaded gas was used y very few people. Its the unleaded part and all
the new additives used that has me wondering.

--
Bill
Chesapeake, Va


wrote in message
ink.net...
Use what the manufacturer recommends. It's been proven on dynos over many
years on 2 cycle engines of many kinds that high test does not increase
horsepower, it improves the longevity of the engine conponents, most
notably
pistons, if the engine recommends premium, rarely does it do any good
either
way on engines designed to run regular and in fact can decrease the
available horsepower.
The last tests I did on a motocross bike showed that regular produced 1.6
hp
more than premium, av gas or race gas. It also knocked and binged big time
over any load over 75% and holed a piston in under twenty minutes on the
dyno.