I've been using my neighbor's FIL's splitter for just short of 3 bush cords. I know that if a neighbor of my son in law had borrowed my splitter, I'd be a little concerned, so I want to put him at ease and also say thanks by returning the splitter in as good a shape as I can. I'm going to change the oil & plug, & top up the gas. But beyond that I don't a great grasp on what to do. Suggestions?