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Types Of Gas A Buick Encore Uses (Explained)

On this blog, we put a lot of effort into research to get accurate answers about the vehicle you are looking at. Here on our database, you can find answers to your questions about many different types of cars. To answer the question about the fuel requirement, we have made sure to check all the manufacturer’s suggestions on various available fuels in the market. But before we dive deep into the details, here’s a quick summary:

Gasoline with a minimum octane rating of 87 is required for the Buick Encore, whether the 1st gen or the 2nd gen model. The 1st gen came with a 1.4L, while the 2nd, released in 2019, has two available engine options – the 1.2L and the 1.3L. Fuels that have more than 15% ethanol should not be used for the Buick Encore.

This is just the tip of the iceberg. We will go deep into every engine and the type of gas you can and can not put, so take a deep breath. We are going to go deep. First, we will discuss all the engine types and their fuel requirements, and then we will explain which ones are better and which ones are worse for your engine and everything related.

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Also read: Buick Encore: Oil Type, Capacity & Weight (Explained)

Fuel Requirements Based On Engine Type

There have been two generations of the Asian-made Buick Encore. The first generation lasted until 2019, and the second-gen Buick Encore debuted in the Shanghai Auto Show.

2019 – Present

The first-gen Buick Encore CVT paired with a 1.2 L inline 3 Turbo engine paired with a CVT should get a minimum of 87 of octane. Anything less than 87 would cause poor gas mileage and have a consequence known as engine knocking discussed in detail in the later section.

Another option in the 2nd gen lineup is The 1.3 L turbocharged inline-3 paired with a 9-speed automatic – it should be filled up with gasoline having a minimum octane rating of 87. It is advised not to use anything less than 87 of octane.

For both engine options, it is recommended to use the TOP TIER detergent gasoline. For the latest models, the manufacturer has given an alternative on top of it, ACDelco Fuel System Treatment Plus, which can be used.

Another aspect that you need to understand is the Ethanol percentage that is added to the gasoline mixture. You would see variables like E10, E15, even E85. These numbers represent the volume of ethanol added to gasoline. All the manufacturers allow the usage of E10-type gasoline.

In 2011, EPA started allowing the usage of E15 as well. E85, however, is flex-fuel that you should not be putting in ordinary vehicles. In the later section of this article, we will be going into details on how you can identify your car if it’s flex-fuel appropriate or not.

2013 – 2019

In the 2nd gen Buick Encore, you only have one engine option. According to the manufacturer’s recommendation, gasoline with a minimum of 87 octane rating should be used in your 1.4 L Turbo inline-4 paired with a 6-speed automatic transmission. Anything less than 87 of octane is not recommended.

You can not put anything above E15. It’s unnecessary to go for the premium fuels as it won’t make much difference because you would need higher compression for those to make a difference.

Higher Octane rating does not mean that it would be better and give you more horsepower. It indicates how much it can delay combustion, which is essential when you have a very high compression engine. Higher compression means that you either have a turbo or a supercharger that pumps in a lot of air for combustion.

Suppose you put lower octane-rated gasoline in a high compression engine. In that case, the gas will burn prematurely, and the burn won’t be as smooth as it should be, thus reducing the engine’s performance and causing engine knock.

What Types Of Gasoline Can And Can’t Be Used?

On top of the regular/conventional gasoline and diesel, there are plenty of other fuel types in the present-day market. Most of these alternative fuels are marketed to be great, but are they? Let’s find out about each of those fuels, whether or not they are suitable for your Buick Encore or not. 

Buicks Recommendation

The company itself recommends the TOP TIER Detergent Gasoline to keep your engine cleaner and help reduce carbon deposits. Buick also recommends using gasoline that has a minimum octane rating of 87. It advises against using gasoline that has an octane number of less than 87. Above 87 Octane rating is okay but not recommended.

Reformulated Gasoline

It’s one of the newer types of gasoline available in the market, specifically designed to have fewer carbon emissions than conventional gasoline. Although it’s not on the list of recommended fuels, you can, however, use RFG — it’s safe and wouldn’t cause damage to the engine.

This fuel is advantageous in areas that have strict emission requirements. However, people in regions with extreme pollution should have reformulated gasoline regardless – as it would help the environment by exposing it to fewer emissions, less smog, and most importantly, we get a better Air Quality Index. 

Gasoline/Oxygenated Blends Or E85

It’s advised against using the E85. This fuel is also known as Flex-fuel, and you are not allowed to put this fuel in your Buick Encore. If you do so, you will be damaging your engine components. It would help if you did not put anything with more than 15% ethanol, and E85 has 85% ethanol, which the manufacturer does not recommend.

Flex-fuel contains 85% ethanol. Although it runs pretty clean in the engine, it has corrosive nature. Normal vehicles are not designed for flex-fuel. They are perfectly fine on running on regular gasoline. To know if a particular vehicle can run on E85, you can take a look at the gas cap. Or you can take a look at the gauge cluster. Sometimes it’s mentioned on the fuel gauge.

Last but not least, you can check the owner’s manual to know which fuel is the best for your vehicle. Buick Encore is not flex-fuel-appropriate.

Gasoline With Added Materials

There are hundreds of additives flowing in the market, and you can use those that are supposed to increase the octane number. There are also those which clean the internals of your engine.

Buick recommends the TOP TIER detergent gasoline additive, which will keep your internals clean and prevent carbon deposits. And it advised against using octane boosters additives. Octane boosters and other additives have methanol, ferrocene, aniline, and methylal, which damage the fuel lines.

These substances corrode the metal and even damage the rubber components, and these are the kind of damages that will not be covered in the warranty. If TOP TIER detergent gasoline is not available in your region, you can put ACDelco Fuel System Treatment Plus-Gasoline instead. 

You can add these additives to your gas tank on every oil change. Make sure to have a full tank and add according to the instructions mentioned on the can of additive you are adding. Some fuels come with premixed additives, and one such fuel is the Shell V-Power. It comes with several valuable additives that help keep your engine healthy.

Driving your vehicle on premium fuel is not recommended, but after a couple of thousands of miles on regular gas, you can run your car on premium to help clean your internals. If you run premium gas for about 2500 miles, it can help clean 70% of carbon debris in your engine.

Gasoline With MMT

MMT stands for Methylcyclopentadienyl manganese tricarbonyl, which can severely damage your emission system as well as your spark plugs. This is a kind of metal – and the manufacturer does not endorse metals additives. Any damages caused by these additives will not be covered under warranty.

It reduced knocking but at the expense of environmental damage. Most of these metals were added in the past, and you have probably heard about leaded gasoline. These days, only race fuels have these metal additives. Regular gasoline is always unleaded; it is prohibited to add lead to gasoline.  

What If I Hear A Knocking Noise From The Engine After Refilling

A very faint knocking sound might be heard from the engine – which is normal. But if you hear a loud knocking sound, it might be because of low-quality fuel with a lower octane rating. You can combat this droning noise/slight knocking by running your vehicle on premium gas for a while, and with that, the knocking will go away.

Poor quality fuels cause knocking in the engine, but if you hear a loud knocking noise, then you should take your Buick Encore immediately to a dealership to have it properly checked and diagnosed. 

Also read: 13 Common Problems Of A Buick Encore

Does the Buick Encore Have Good Gas Mileage?

2019 – Present

In the 1.3 L inline 3 Turbo, you get 26 miles per gallon in the city and 29 miles per gallon on the highway. This one is for the 9-speed automatic variant, but if you go for the one with CVT paired with a 1.2 L inline 3 Turbo engine, you get 26 mpg in the city and 30 mpg on the highway.

Here’s a table for you to make things clear:

EngineLowest Combined MPGHighest Combined MPG
1.3 L2629
1.2 L2630

2013 – 2019

In the older Buick Encore, you have only one engine option: the 1.4L inline-4 Turbo paired with a 6-speed automatic transmission. With this engine, the Buick Encore can do 25 mpg in the city and 33 mpg on the highway.

EngineLowest Combined MPGHighest Combined MPG
1.4L2533

What’s The Gas Tank Size Of A Buick Encore?

The first-gen Buick Encore 2013-2019 has a capacity of 53 liters or 14 gallons, while the 2nd gen Buick Encore has a capacity of 51L or 14 gallons. There is a difference of 2 liters in both generations. 

How Much Does It Cost To Fill Up A Buick Encore

We will look at the most expensive state and the cheapest state and calculate how much you would have to pay in each of these states to fill up a Buick Encore – all the remaining states will fall in between these two.

So the most expensive state is California, where the cost of one gallon of gasoline is $4.388, and when you fill-up the whole tank, you would be paying $61.432 for the 2nd Gen Buick Encore as it has a 51L/14-gallon tank. The 1st Gen, however, comes with a 53L tank – 2 L extra compared to the 2nd Gen models. 

Now let’s move to the cheapest state, Mississippi. Here the cost for one gallon of gasoline is $2.816. Texas also has the same price of $2.816. In these two states, you would be spending $40.054 to get a full tank of gasoline.

So wherever you are, you would be spending $40-$62 to fill up an empty tank of the Buick Encore.  

Sources