The rod knock is very unlikely to be related to Stabil.
Stabil is useful, but if you put it in your emergency generator thinking the gas will still be good three years from now, you're mistaken. At the end of each mowing season, I put the last of my gas (maybe a month old) into my car's tank and burn it off. I keep about half a tank of gas in one of my mowers to tow firewood and other stuff around the yard during the winter. Come spring I burn off the rest of that gas and buy fresh gas from the local station.
Ethanol versus non-ethanol doesn't seem to be so much of an issue. The local gas station only sells non-ethanol, and it gums up every bit as fast as the ethanol gas.
A final note for those who own generators for emergency use - when your emergency is done, pickle your generator. Drain the gas out of it! Clean all the trash, spills, dirt, etc. off of it. Set it some place it won't get rained on, and bag it. Toss in some moth balls to keep the critters out.
Stabil is useful, but if you put it in your emergency generator thinking the gas will still be good three years from now, you're mistaken. At the end of each mowing season, I put the last of my gas (maybe a month old) into my car's tank and burn it off. I keep about half a tank of gas in one of my mowers to tow firewood and other stuff around the yard during the winter. Come spring I burn off the rest of that gas and buy fresh gas from the local station.
Ethanol versus non-ethanol doesn't seem to be so much of an issue. The local gas station only sells non-ethanol, and it gums up every bit as fast as the ethanol gas.
A final note for those who own generators for emergency use - when your emergency is done, pickle your generator. Drain the gas out of it! Clean all the trash, spills, dirt, etc. off of it. Set it some place it won't get rained on, and bag it. Toss in some moth balls to keep the critters out.