His Buick's mileage doesn't surprise me.
Back in the day when I was working for GM corporate I had a company car (1997 Olds Cutless SL)
that regularly hit 32 mpg. Also had the coldest AC I can recall for an early 134a vehicle. On a separate
gauge, I had the interior down around 34 degrees in the middle of the desert one summer.
As the drill sergeant said, "I taught you everything you know. I didn't teach you everything I know."
"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams