I only drove the $\#tbox Miata for about 5 weeks this fall - my 5th season since I got the car. (I typically put it on the road in late summer... fall is my favourite season for a convertible.)
No repairs this year. Last year it needed a thermostat. I replaced the rad in the first year.
Did one fill-up at around 53 MPG.
It's hilarious: getting back into the Mirage after putting the Miata away always feels like the lap of luxury. So quiet and refined! Such a comfortable ride!