John Paul, AAA Northeast's Car Doctor, answers a question from a reader wondering whether they need to follow the ...

Dyno test of budget friendly 5.3L LS engine that makes 416 hp on 87 octane gas We put together a budget 5.7L LS engine (327 cubic inches) to show that you don't have to go broke to enjoy the ...

A page allegedly taken from a Ford training manual shows just how much power that the 2015 Ford Mustang's 2.3-liter EcoBoost engine loses when burning lower octane fuel. It appears to make around ...

“If it says ‘premium required’ I strongly suggest using the premium gasoline,” Studzinski said. However, if a driver mistakenly puts 87-octane regular in a vehicle that needs 91 or ...