Different Types of Gasoline - Service Information you want to know in Salem, OR

In Oregon, getting gas is as easy as rolling up to the pump and telling the attendant what kind you want. But are you choosing the right gas for your Chevy? At Capitol Chevrolet, we want to make sure that you have the best information so you know how to take care of your Chevy car, truck, or SUV. With that in mind, we've written this page filled with questions and answers about different types of fuel.

Four gas pumps in their holders.

5. What Is Top Tier Gasoline?

You may have heard that Top Tier gas is better for your engine, and you may have wondered if this is really the case. The short answer: yes.

Now for the longer answer. Pure gasoline is essentially the same; however, different companies add different detergent additives to their gas to prevent carbon buildup and poor performance. Many companies will add only the detergents that are required by law. But companies that sell Top Tier gas go a step above. They add even more detergents and additives to keep your engine clean and your gas mileage high.

A person filling up their car and giving a thumbs-up sign.

4. Does My Car Need Premium Gas?

You may have noticed that most stations will sell regular, mid-grade, and premium gas. This will generally be labeled with 87, 89, and 92 or 93, respectively. These numbers refer to the octane rating, and you shouldn't go with a lower octane rating than is recommended in your car's manual. But is there a benefit to going higher and choosing the premium gas?

Generally, the answer is no. Using premium fuel in most passenger cars doesn't do much of anything, except drain your bank account faster. However, if you're driving a high-performance Chevy, check the manual. Premium fuel may be recommended or required, which means it's best to use it.

3. What Is E85/Flex Fuel?

At most gas stations, the gas that you get isn't pure gasoline and detergents: there's often up to 10% ethanol mixed in there, as well. Ethanol is a biofuel that's made from corn or sugar cane, and it may help make your Chevy more eco-friendly.

E85, or Flex Fuel, is gas that's made of 85% ethanol and 15% gasoline (plus detergents). While this is a great choice for Flex Fuel Vehicles like most of today's Chevy lineup, it's only recommended for those vehicles. While you may not harm a regular engine by adding E85, the engine may not respond well, and might run poorly until you fill it up with a lower-ethanol gas.

An old diesel pump. 

2. What Is E15 Gas?

E15 gasoline is available at some gas stations. As you might have guessed, it's gas that contains 15% ethanol and 85% gasoline--essentially the reverse of E85. If you're driving a newer car, it's generally fine to use E15. However, if you're not sure, the pump may have recommendations.

1. What Is Diesel Fuel

Unlike the others we've discussed, diesel is a different type of fuel entirely--it contains no gasoline at all, and it's meant exclusively for diesel engines. Diesel engines use compression to combust the fuel, rather than a spark like gas engines use. This means that diesel fuel can get away with having a low octane rating. If your Chevy has a diesel engine, make sure to tell the attendant to use diesel. And if you have a gas engine, never use diesel: it can make your engine shut down, and you'll likely need service to make it work again.

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