RE: WD40 instead of after-run oil?
wd40 is good you take the fuel line out of the high speed and take the plug out and spray some wd40 in then spin the motor mby spray it one more time and spin then put the plug and line back .After run is better but wd40 is good if you have a pull start or electric start because it does not gumb up the one way berrings so they last a bit longer ,when you use after run or wd40 it is good to do it with your motor still warm before it contracts to much .