That's a lot of turd polishing there....no that's a lack of knowledge on your part...and showing it on the internet

The fsm is a poor substitute for proper bearing preload.
Trying to figure out how to make a 1970 automobile go 140 mph without vibration and stopping issues will lead one to figure out how to set up front bearing preload with the proper tool. It does indeed effect gas mileage and proper braking.

Rolling resistance and engine efficiency is the issue here and it does not matter what kind of car it is.