Posted on: Aug. 22, 2017 in Auto Maintenance

When you pull up to the pump, you may automatically go for the cheaper gas (hey, it’s cheaper!) or you may always spring for the premium, assuming more expensive must mean better quality. Then, do you wonder if you’re making the right choice for your vehicle? Do you even know the difference between premium and regular gas?


Many car owners just go on habit and don’t know which gas is best for their car. Here’s some information to help you decide.

The main difference between premium and regular gas is the octane rating. Regular gas generally has an octane rating of 87, whereas premium, or high-octane, gas is 93. The higher the octane level, the higher the pressure it can withstand.

Most modern cars are equipped with sensors that tell the engine what kind of gas you’re using and most of these cars are set to run on regular gas as the default. If you happen to put premium gas into a car set for regular, the car generally won’t make any changes in how it runs. You’ll gain neither higher performance nor better fuel economy by putting in premium gas.

However, there are some high-performance cars that will run better on premium gas and the manufacturer will recommend you use it. If you have one of these vehicles and choose to use regular gas, the car will still run but the engine will adjust itself. You’ll feel it though, as the car will have less power.

So, assuming you’re not in need of a high-power performance vehicle, is there any reason to use premium gasoline? Premium gas does often contain additives that are good for your car. Some will argue that this higher priced fuel is worth it for this reason. However, you can also have a fuel flush performed on your car and accomplish the same thing.

All in all, it’s usually best to follow the car manufacturer’s recommendations when it comes to how to care for your car. Most likely, they’ll tell you that regular is just fine.

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