ShinerBock wrote:
Gonna bring this one back from the dead because I finally found the Engineering Explained video about the testing AAA did on using premium on dual fuel vehicles. It actually goes over fuel economy, power improvements, and timing adjustments of the 3.5L Ecoboost, 6.2L GM and various other vehicles.
Video - New Study Shows Premium Gas Isn't Always Worth It
AAA Premium Fuel Research
The way I understand these tests is that they simulate driving up a grade, that is up to 6%, using throttle openings that will keep the empty vehicle at 65 MPH. Since we are discussing tow vehicles, testing an F150 Ecoboost fully loaded with a large, heavy, high profile trailer up a 6% grade on a hot day might give some meaningful information. Of course knocking and timing adjustments would be considerably different between fuels causing a much larger spread in horsepower and fuel usage.
