Originally Posted by JAMMINKRAZY

I never use it unless the engine is going to be sitting for an extended period of time. The oil that is in your fuel should do a fine job of protecting the engine for brief storage. If I do use ARO, I will only use GMK supply "afterlife" or Blue Block rust inhibitor. They are both very thin oils which will coat the internals, but not gum the engine up. They are also both safe for silicone filled cranks. IMO one of the worst things you can do is to use a really thick after run oil. It will gum the engine up and make it a bear to start up.