1991 Toyota MR2. 269,000 miles now. Looking forward to a routine 30k interval service at 270,000. :-) 32-34 mpg in town/and on expressway (65-70 mph here). 38 mpg on the highways (55 mph). EPA ratings are 22/28 mpg, I can't get that poor mileage out of it even if I try. Does require periodic rust repairs. Last year I had a shop do a partial paint job on the back and top of the car (Sun ate through the paint/had primer showing) and small rust repair on a wheel well for $1200. Also got a new bonnet latch (original one failed when they were checking fluids during an oil change) for about $600. Other than that I can't recall it needing anything other than fluids in 2013. Parts are expensive and hard to get, but breakages are very rare. About as mustachian a mid-engined sportscar as one can find.
1995 Mitsubishi Eclipse GSX. 124,000 miles. Not terribly mustachian, but still better than the average SUV/minivan on the road I suppose. Parts are cheap, and *most* of them are readily available (there's a few that are insanely hard to find) but it breaks all the time and gas mileage is poor. At one time I was getting 28-30 mpg mixed driving out of it, but it was due to a fuel flow problem that made it horrible to drive in traffic. With that fixed it gets 26 mpg no matter what kind of driving I do with it (book value is 21/29 city/highway). 2013 was an ugly year. I had air intake piping rust out and need replacement (did some upgrades at the same time, so dropped about $3500), some electrical wiring fell apart and had to be repaired (my own labor), a cooling system hose blew (original, when I had the shop do all the hoses a couple times they failed to notice/do this one hidden hose! $150), a wheel bearing seized (and ultimately cost $3000+ due to lack of parts/collateral damage), brake caliper seized (fixed myself for around $20 in parts), a 9 month old battery cooked off (manufacturing defect?) and needed replacement ($120), and I just took it in for an alignment to finish the last of the repercussions of the wheel bearing episode only to find that the 1 wheel that's so far out as to do severe tire wear has a rusted solid toe adjuster (Charged me $39 for a front end alignment only, at least the steering wheel is straight again. If I fix the rear and bring it back in 30 days the warranty kicks in so I only have to pay for the rear part of the alignment). So, it's going back up on jack stands this weekend so I can do more suspension work. At least parts are cheap. It's been on jackstands at my house all but 2 weeks this year. In 2013 it was on a lift at a shop for a total of around 7 months for the various problems. As of now I've decided that this will be my project/fun car. I will work on it for fun. I won't count on it for getting to work. If it doesn't run, I won't care. Insurance and registration aren't too bad and like I mentioned above parts are (mostly) cheap. Labor is expensive, so I'll just do everything myself on it now. :-)