I've never used anything in any of my gas powered anything. I do drain the carbs on everything when I put it away though. I turn the gas off on my airhead at the end of my street and then dump the bowls every time I ride it. Same with my mower, I installed an in-line valve and run it dry too. if I use a two stroke tool, like my chain saw, I dump the leftover fuel out and run it dry. So far, So good.
I know i just jinxed myself... going out now to find some wood to knock on.
Thanks to the Interstate Highway System, it is now possible to travel from coast to coast without seeing anything.
-- Charles Kuralt
I never plan a ride, just the destination and that's always subject to change.