Premium vs. Regular Gas: Does It Matter?

Regular, plus, premium, supreme … does it really matter what type of gas you put in your car or truck?

That’s a tricky answer.

According to the California Energy Commission, there is not much difference between the different grades. Citing a study, the California Energy Commission said there is not much difference in energy content between the grades.  

But before you fill your car with regular gas, you’ll want to keep on reading.

The commission also says that you should follow your manufacturer’s fuel recommendations to prevent engine knocking. That means if the manufacturer recommends premium, you should probably use it.

In the cases where the manufacturer recommends a regular grade, there’s no need to go with the premium. You’re just spending money for something that you don’t need.

Typically, heavier vehicles or vehicles with high-performance engines require premium gasoline. To be safe, you’ll want to check the owner’s manual for your vehicle.

In most parts of the country, premium gas has an octane rating of 91 or 92 and regular gas has an octane rating of 87. In higher elevation areas, you might see different octane ratings for premium and regular gas.

If you’re unsure what type of gas to put in your car or truck, check with your mechanic or a Toyota parts specialist.