Re: Premium Fuel?
The only difference really between ethanol-free low octane fuel and high octane fuel (aside from the obvious octane rating) is that higher octane fuels tend to carbon up the chambers, piston tops, intake valves, and plugs. If an engine runs on 93 all the time (in this area) it is very dirty inside. Lots of black carbon. Of all the engines I've had apart, the cleanest were the ones that ran the cheap fuel. Now, you can also use a bottle of Ringfree (sold by Yamaha) that does an excellent job of removing carbon deposits. On 4 strokes, change the oil after you run the stuff through the fuel. On 2 strokes it does a great job of removing the carbon from behind the rings and from the chambers and piston tops. The stuff works!
