The difference between 87- and 89-octane is subtle. Midgrade gas came around at a time when it was needed, but it has since ...

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 ...

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 ...

There's a new type of gasoline at gas stations nationwide. It is called "Unleaded 88." While it is OK to use in many vehicles, it is not suitable for all. While Unleaded 88 is rated at one octane ...