Fill Er Up: Common Types of Fuel

Fill Er Up: Common Types of Fuel

When you head to the gas station, do you put much thought into the type of fuel you choose? Chances are, you grab the cheapest option, fill up your gas tank, and leave. How do you know if the cheapest option is what is best for your vehicle?

Understanding the different types of fuel can help you make wise decisions on what to put in your vehicle. Keep reading to learn more about the top four fuel choices that you will see at the gas station.


Gasoline is the most common type of fuel that you will see at a gas station. It also is the type of fuel that works best for most cars, boats, lawnmowers, and motorcycles.

Gasoline typically comes in three different grades at the gas station: unleaded, mid-grade, and premium. The grade of gasoline is determined by the octane rating of the gasoline.

The lower the octane rating, the cheaper the gasoline will be. Gasoline with different octane levels burns at different rates. If the gasoline has a lower octane rating, it will burn quickly which explains why this type of gasoline is the cheapest.

Just because the lowest grade of gasoline burns the quickest doesn’t mean that it isn’t the right choice for your vehicle. If you have a vehicle that recommends using unleaded gasoline, you won’t see any benefits from using more premium gas.


The second most common type of fuel that you will see at the gas station is diesel fuel. Just like gasoline, diesel is made from petroleum but it goes through a refining process before sold.

One of the main benefits of owning a diesel vehicle instead of a gasoline vehicle is that they get better gas mileage. Even though diesel is more expensive, diesel can save money over time.

If you have a diesel vehicle and want to get even better gas mileage, consider installing a module instead of a tuner to help optimize your vehicle’s fuel injection.


Ethanol is a type of fuel made from biomass such as sugarcane, corn, and sugar beets. Overall, ethanol is better for the environment than traditional gasoline and it is cheaper to make.

While it isn’t common as the main source of fuel for a vehicle, ethanol is often blended with gasoline to create flex-fuel.


Bio-diesel is a fuel created using vegetable oil or animal fats. To create bio-diesel, the glycerin from the oil/fat is removed and methanol and lye are added. Bio-diesel fuel works for any vehicle that is designed to run off of diesel fuel.

What Types of Fuel Are Best For You?

Next time you head to the gas station, think carefully about the types of fuel you put into your vehicle! Instead of just choosing the cheapest option, be sure to choose the fuel that works best for your car.

If you enjoyed this post on the four most common types of fuel at the gas station, be sure to check out our auto section for more.