this is what i do...run the engine completely out of fuel...then depending on how long i think i will not run it i will load it up with some type of oil'''i usually use after run oil because my engines have no epoxy in them...check it every week or two...like role it back and forth...also...after run oil will attack some epoxy's...if you are gonna use after run oil...make sure that your crank does not have epoxy in it...epoxy is how you change your timing among other things...