If you're an RV owner deciding between a gas and a diesel truck, you should know that each offers pros and cons. Here's how ...

You need to use premium gas whenever your owner's manual says to use it. But don't use it if the automaker says it's okay with 87. Then you're wasting money.

Thinking of getting an electric vehicle? E.V.s tend to be pricier than comparable gas cars, but they have lower maintenance costs. And charging with electricity is typically cheaper than stopping at ...

Fuel comes in different grades based on octane level at gas stations. Only some performance engines require Premium fuel for the best power output, fuel efficiency, and engine function. Are you ...