He forgets an important variable.
The density of gasoline also increases inversely with temperature. Therefore, at a lower temperature gasoline has more BTU per gallon.
A liquid like gasoline does not change its density as much with temperature as does a gas like air. Denser air should increase the energy yield from combustion, but probably not as enough to match the increase in air resistance. Air drag increases as the fourth power of speed, IIRC.
In any heat engine the greater the temperature difference between input gas and exhaust gas the more work you’ll get out of the engine — all things being equal (the all-important caveat).
More oxygen higher pressure or colder, to mix with the gas in the chamber, hence more boom. My cycle definately gets more torque generated when colder and higher pressure.
Actually, that was what I was looking for, because I read the notice on the gas pump today (for thr first time) that said the volume delivered varied with temperature, but I really didn’t know which direction for a non-aqueous liquid. But I’d have to say his table comports pretty well with my driving experince, i.e. 27.5-29 mpg summer/ 25 winter over pretty much tne same roads. I usually see a real drop-off between 40-50 degrees, even with gas bought on successive days from the same station.