The research gives lie to the widespread belief that auto owners benefit from using more expensive high-octane premium fuel in vehicles that run fine on regular.
"There's no question that higher-octane premium fuel has the potential to boost a vehicle's fuel economy and performance, however, engines have to be calibrated to require that fuel to see the full benefit", John Nielsen, AAA's Managing Director of Automotive Engineering and fix, said in a statement.
The small gain in fuel economy is more than outweighed by premium's higher price.
In 2015, drivers wasted $2.1 billion by paying for premium fuel when their vehicles were created to operate on regular, according to the AAA.
AAA tested six vehicles: a 3.5L Ecoboost Ford F-150, 6.2L V8 Cadillac Escalade, 5.0L Ford Mustang V8; and four-cylinder engines in a 2.0L Mazda MX-5 Miata, 1.8L Audi A3 and 1.4L Jeep Renegade.More news: Nasa Planet Announcement: Kepler Discovery Changes Everything
Last year, almost 1.5 million new vehicles sold in the U.
AAA Northeast found in its weekly survey released Monday that the price of self-serve, regular is averaging $2.49 per gallon. AAA said the growth in these fundamentals are bearish for longterm oil prices, which analysts from the Oil Price Information Service believe could soon see a significant drop back to $50 per barrel due to reduced global demand during the winter.
"Horsepower for test vehicles averaged an increase of 1.4%", AAA said.
Premium may boost horsepower for some engines, but likely not enough for most people to notice in normal driving.
"I have a Mustang Cobra that I have to use premium in because I really tell difference in power and stuff". S. recommend, but do not require, premium gasoline. These vehicles could sustain damage from prolonged use of Regular gasoline. A series of tests were conducted to determine whether the use of premium gasoline resulted in improved fuel economy and increased performance (horsepower). Higher levels of octane allow engines to run at higher compression ratios without knocking.