this is probably going to sound a little silly, but today i did my first oil change on my P5, with the help of a friend. filter was on damn tight; took us about 10 minutes to get it off. after that though, smooth sailing. the hardest/most time consuming thing about doing it is jacking up the car.
also changed out my foglights. i don't mean the bulbs, i mean the entire fog light. picked up an extra stock set for dirt cheap, so in they went and my originals came out. one of the bulbs was burnt out in mine, but due to mazda loc-tighting one screw in each, i couldn't change out the bulbs (stripped the screw).