Hey man. I'm not being disrespectful.
I just think your density altitude argument is pretty irrelevant to what this guy is talking about. It's minute power decreases in the grand scheme of things. It's not an issue that would cause a car to drive like crap.
I have pretty much zero clue about turbos on cars so I'll take your word there. But this car ain't turbo'd is it? This car at 100F is at the same density altitude as Calgary on a 15C day. We aren't hearing Calgary drivers complaining about their cars driving like garbage on nice spring days. I think you're barking up the wrong tree a bit.
And I hope FL20 is a typo. Theres no such thing.
Don't tell my Mother I'm a pilot.... She thinks I play piano at the whorehouse...