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 ...

We have to separate the chemical "octane" from a fuel's "octane rating" since they can be two different things. Think about it this way. If you learned your shapes in kindergarten, you should easily ...

We’ve been reporting for years that there’s zero advantage to using a higher-octane gasoline than your car requires, and that you can also get away with regular gas if your car merely recommends ...

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 ...

Costco’s premium gas, available at locations nationwide, has sparked a debate among drivers about its exact octane rating. Is it 91 or 93? And does this difference have any significant impact on their ...

In the decades since its founding, Costco has become, arguably, the biggest wholesale outlet chain in the world. At this point in the wholesaler's history, the list of things you can't buy inside a ...