[mitchdoogle]

Replacing a tire is one thing that requires specialized equipment built for the task, but something like regular maintenance - changing oil, replacing filters, battery etc is relatively easy and can be done with basic tools that almost every "handy" person will have: wrenches, screwdrivers, etc.

[kelnos]

Years ago I decided I should know how to change the oil in my car, and do it myself regularly. I bought the required equipment, did it once, and then never did it again. It took me longer than it took someone with expertise (and expensive, professional equipment), and it actually cost more, when considering I couldn't buy motor oil in bulk, and had to pay to dispose of one-off quantities of used oil properly.

I would certainly replace the battery on my own, though. Well, maybe: getting a new battery home without the use of my car might be so annoying that it would probably be easier to just get a tow to a mechanic (or get someone to jump it and then drive to the mechanic). And again I'd have to deal with disposing of the old battery on my own: again, annoying and costly.

[bombcar]

The main reason I do my own oil changes is that all the cheap places are notoriously bad at it.