Something not mentioned but very important is Ethanol.
Ethanol mixed with gasoline reduces the MPG.
Ethanol has less energy per gallon. I wouldn’t be surprised that adding 10% Ethanol costs 5% on MPG.
If they can use ethanol efficiently and without subsidy, that’s fine with me. I want cheap energy and energy independence.
There is an ugly rumor that Pelosi and Gore will set a new standard. A standard that will BAN dealerships from offering Optional wheels or tires “that might lower MPG numbers”.