Squeaked 55.5 MPG US = 4.2 L/100 km from the latest fill - a new best tank!
I tried fairly hard ... and the sad thing is it would have been 57+ if it weren't for a cool (10C / 50F) ~100 km trip in a convoy with a friend's car. (I drove a bit faster than I would have normally.)
Annnnnd... that'll be the last fill-up for 2022.
The trees are turning, we've had a few frosty evenings. I haven't seen ice in the puddles in the morning yet, but it won't be long before it's too cool during the day to open & close the top without risking cracking the old vinyl/plastic (cracking it MORE, I mean).
And I'm ordering a thermostat - the last time I ran the heater, the engine temp cooled waaaaaay down.