American gas usually ranges from the high 80s to the mid 90s in octane rating, and yet gas in Europe can be 4-6 octane higher ...

Filling up with lower-octane gas will cost less at the pump, but this Hellcat owner found that it may come with some ...

Add Yahoo as a preferred source to see more of our stories on Google. With the price of regular unleaded gasoline still in the $4-a-gallon range, the comparative price of premium is kind of a bargain ...

Gas stations are rolling out a cheaper new fuel grade, but is it safe? Discover the hidden differences before you fill up your tank with it.

Labeling different gases as “regular” and “premium” is a bit misleading, as many cars only require regular gas and should only run on regular gas. Premium gasoline is not necessarily a luxury product ...

Until electric cars and hydrogen fuel cell vehicles become the norm, most of us will drive automobiles that run on fossil fuels. We know it is not good for the environment, but it is the only option ...

Back in the day—1965—were we doing anything by adding mothballs to the gas tank in my new Plymouth 383? The legend about mothballs improving internal-combustion engine performance dates back to the ...

With the price of regular unleaded gasoline still in the $4-a-gallon range, the comparative price of premium is kind of a bargain at many stations. Really. When the price of regular surged this spring ...