Does the 2020 Buick Encore require premium gas?

Black 2020 Buick Encore parked in a city.

Fuel Recommendations for 2020 Buick Encore

The 2020 Buick Encore is a delightful specimen of vehicle. So delightful, in fact, that many drivers find themselves wondering: does this model require premium gas? Read on to find out what fuel to use in the 2020 Buick Encore!


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The 2020 Buick Encore does not require premium gas. At the least, GM recommends the use of regular unleaded gasoline with a posted octane rating of 87 or higher. This is simply the standard gas that one will find at most stations. Do not use a gasoline with a posted octane rating of less than 87.

Most specifically, GM recommends using regular unleaded 87 or higher octane gas that meets the ASTM specification D4814, but this is probably a mostly unnecessary detail.

Interior front cabin of a 2020 Buick Encore.What’s the best fuel to use in a 2020 Buick Encore?

According to the 2020 Buick Encore Owner’s Manual, GM recommends the use of TOP TIER Detergent Gasoline. This fuel is said to keep the engine clean, reduce engine deposits, and maintain optimal performance in the vehicle. TOP TIER gasoline is designated with its corresponding logo.

What happens if I use a fuel with an octane rating of less than 87?

Using a lower posted octane rating than recommended will lower fuel economy and performance. In addition, it may cause engine knock and reduce the life of the emissions catalyst.

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Can I use E85 or FlexFuel in my 2020 Encore?

E85 and FlexFuel should not be used in the 2020 Buick Encore. No gas with an ethanol level higher than 15% should be used. Doing so may damage the vehicle and void the warranty.

What other fuels should not be used in a 2020 Buick Encore?

Do not use fuels with any amount of methanol, methylal, ferrocene, and aniline. These can result in corrosion of the metal fuel system parts, along with damage to the plastic and rubber parts.

Also, if you were thinking of utilizing fuel that contains metals such as methylcyclopentadienyl manganese tricarbonyl, don’t do it. This can damage the emissions control system and spark plugs.

For more information, check out the 2020 Buick Encore Owner’s Manual.