I work on my own cars and bikes. Unless it is a warranty problem. The only times I didn't do my own oil was when I was back in VA living in an apartment. It was against the rules, and it wouldn't have been worth it getting caught. And now on the Mustang, I get scheduled mainteneace that came with the warranty I got. This way it is logged and if I should need warranty work, i don't have to get in any arguements.