[Christ]

I have to mention that if your engine is functioning, and not malfunctioning, you're not depriving it of airflow. Keep in mind that most engines are already running air deficient compared to their max VE. By using hotter air, you're only allowing a higher throttle opening without making unnecessary power, reducing pumping losses. You're not putting your engine in danger at all, other than from detonation, and if your engine didn't like the warmer air, you'd be getting worse mileage as it dumped fuel to keep detonation at bay, or retarded the timing for the same reason.

None of the reasons in your post, although they were posted with conviction, as it appears, weren't "the whole story" as it were.

Lots of cars could benefit from a smaller engine with a turbo, because you're not really efficient at low throttle angles, and an engine that's small enough to be truly efficient at cruise conditions isn't going to be able to accelerate quickly enough to really be effective in the real world. Add a turbo and a bit more fuel with detonation deterrents to that smaller "efficient cruise" engine, and you've got a great combo.

Hm. I didn't go to engineering school, and automakers still haven't really figured this out.