But I would like to be able to do the “easy” stuff on my car. Changing the oil and rotating tires has become second nature. I’ve done the brakes, i.e., change pads, bleed them, etc twice now. I would like to change out the transmission fluid and the differential oil, but to do these you need both a 23mm and a 24 mm socket. From a quick search on the web these will run me $15 a piece, plus $10-15 for the 1/2″ ratchet. Then a oil pump would make this easier to get the oils back in these hard to reach places, another $5-10. Not to mention the cost of the fluids. Probably be cheaper to get the Mazda place to do it when they change my timing belt in a couple weeks.