Trucking companies can now order the Fifth Generation Freightliner Cascadia heavy-duty Class 8 truck with the new Cummins X15N natural-gas 15-liter engine. Earlier this month, Freightliner announced ...

We've all seen octane ratings at the fuel pump, and based on the numbers, it's easy to think the higher number is better. From lowest to highest, the types of gasoline are regular, mid-grade, and ...

We may receive a commission on purchases made from links. Most gas stations have three options that you can put in your vehicle: regular, mid-grade (plus), and premium. These labels are also often ...

The higher the fuel’s octane rating, the less likely it is to prematurely ignite and cause engine knocking. phive2015/Adobe Stock We see the numbers every day at the local gas station, with gas sold ...

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 ...