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 ...

Add Yahoo as a preferred source to see more of our stories on Google. DENVER (KDVR) — Gas pumps in some Western states look a little different than the rest of the country. Most states have the option ...

If you go to a gasoline pump to fill up your car, you’re likely to see 3 different types of fuel: Regular gasoline (87 octane), mid-grade (89 octane), and premium (92 or 93 octane). But what do these ...

Premium and Top Tier gas sound good, but what’s really best for your car — and your budget? In some cases, these types of fuel are indeed better for your car — but for different reasons. Premium 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.

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 ...