DENVER (KDVR) — Gas pumps in some Western states look a little different than the rest of the country. Most states have the option of choosing octane ratings of 87 (regular), 88–90 (midgrade) and ...

Is Premium or Mid-Grade Fuel Worth the Extra Money? Premium gas does have the same amount of ethanol as other grades, but it doesn’t provide any more power or contain better additives than regular gas ...

I have a 2016 Toyota Avalon. The manual says that I should use 89-octane gasoline. I like to buy gas at my local Costco store, where the price is always lower than at the neighboring gas stations.

With all the different engine and combustion theories being tested at the Engine Masters Challenge, it made us wonder about the fuel these powerplants were gulping down. For the 2015 event, we had ...

Settling may be fine for some things, but when it comes to your vehicle, especially when you put so much time, energy and money into it, why settle for something less than the best? If you demand the ...