BMW X1 at the gas station

BMW X1: Regular or Premium Gas? Find Out What’s Best!

If you’re here, chances are you own a BMW X1, or you’re considering getting one.

One question we often see is, “What type of gas should I use?”

So, let’s answer it!

The minimum gas type for the BMW X1 is mid-grade gas (89 octane), although premium gas (91 octane or higher) is recommended. Regular gas (87 octane) should be avoided as you risk damaging the engine.

By the end of this article, you’ll clearly understand why these recommendations exist.

So, let’s start!

At a Glance: What gas Type does your BMW X1 need?

Before diving into the details of octane levels, let’s get straight to the answer many of you might be looking for.

After all, sometimes, all we want is a straightforward response, right?

  • For a regular BMW X1: If you have a ‘standard’ BMW X1 with the 2.0-liter four-cylinder turbo engine (like an xDrive28i), use mid-grade gas (89 octane) at minimum. However, the experts and your BMW owner’s manual recommend using premium gas (91 octane or higher).
  • For a BMW X1 M35i: Do you own a BMW BMW X1 M35i? If so, it requires premium gas (at least 91 octane).
  • Tuned BMW X1: If you’ve given your BMW X1 a tune (for example, using a RaceChip), fill it up using premium gas (at least 91 octane).

Quick note: Occasionally filling up with regular (87 octane) or mid-grade gas (89 octane) won’t necessarily damage your car. But if you want the best for your vehicle long-term, sticking to the recommendations is the way to go.

If you prefer a table overview, here is what you should know:

CategoryTypeIs It OK?Notes
GasRegular (87 octane)!Not recommended.
GasMid-grade (89 octane)Minimum octane rating recommended by BMW, the car will run safely.
GasPremium (91 octane)Recommended octane rating by BMW, which can prevent knocking sounds and prolong the engine life.
GasPremium (93 octane)
GasEthanol-based (E10)Same as the typical gas at most pumps.
GasEthanol-based (E15)!Not optimal for the car, but it won’t be a danger in the short term.
GasEthanol-based (E85)!Mostly not OK. It can only be used if your BMW X1 has a flex-fuel system.
GasReformulated Gasoline (RFG)A type of gas that burns more cleanly, about 30% of the gas sold in the US is RFG. (Source)
AdditivesFuel injector cleaner!Be careful; it can potentially damage the engine when overused.
AdditivesOctane booster!Be careful; it can damage the engine when misused.
AdditivesFuel stabilizer!Be careful; it can damage the engine when misused.

Stick around if you’d like a deeper dive into why these recommendations exist. Otherwise, happy driving, and treat that BMW well!

Reader’s tip: A 2024 Study On BMW’s Reliability: Are They Good Cars?

Does a BMW X1 require regular or premium gas?

Time to dive a little deeper!

According to the owner’s manual of a BMW X1, mid-grade gas (89 octane) is the minimum fuel type, but premium gas (91 octane or higher) is recommended:

BMW X1 recommended gas type from the owner's manual

So, if you fill up your BMW X1 with mid-grade gas (89 octane), it will run safely. However, you risk damaging the fuel system or engine by using regular gas (87 octane).

Tip: The correct gas type for your BMW X1 will always be written on the inside of the fuel filler cap.

But here’s the thing – just because someone can survive on fast food doesn’t mean it’s the best choice for their health.

Similarly, the engine of your BMW X1 is designed to reach its rated performance and consumption values with premium gas (91 octane). It can also positively impact how long your X1 will last!

BMW X1 fuel quality notice from owner's manual

If you own a high-performance version of the BMW X1, like the X1 M35i, premium gas (91 octane or higher) is a must.

While an occasional tank of regular (87 octane) or mid-grade gas (89 octane) isn’t the end of the world, consistently using this gas type can lead to issues like engine knocking, reduced power, and even potential long-term engine damage.

BMW X1 orange

And what about a tuned BMW X1?

Modifications like RaceChip can significantly increase the power of your BMW X1. But when you upgrade the engine’s performance, its gas needs an upgrade too.

Just as an athlete on a rigorous training regime needs specialized nutrition, a tuned BMW X1 requires premium gas (91 octane or higher).

Difference between regular, mid-grade, and premium gas

Fueling up might be a mundane task, but there’s a science to it.

Behind each pump, there’s a lot of chemistry going on to make our vehicles run smoothly.

So, if you’ve been wondering, “What do these octane numbers mean?” let’s take a look!

The octane rating of a gasoline type indicates its resistance to premature detonation or knocking.

In car terms, knocking is a rattling or pinging sound you’d hear when the air-fuel mixture in the cylinders detonates earlier than it should. It’s not good for your engine!

The higher the octane rating, the more compression the gas can withstand before it ignites, which reduces the likelihood of knocking and leads to smoother engine performance.

When you’re filling up, you will typically see the following gas types:

  • Regular gas (87 octane): Regular gas is the most common and least expensive type of gasoline available at most stations. It’s best for everyday vehicles that don’t demand high performance.
  • Mid-grade gas (around 89 octane): As the name suggests, mid-grade gas sits between regular and premium gasoline in terms of performance and price. Perfect for those who want higher-quality fuel without paying too much.
  • Premium gas (91 octane and above): Designed for high-performance engines, this gas resists knocking and ensures smoother combustion. It’s best for high-performance vehicles, luxury cars, and those with turbocharged engines.

The main difference between regular, mid-grade, and premium gas is that regular gas has an octane rating of 87, mid-grade gas has an octane rating of 89, while premium gas has an octane rating of 91 or higher.

Regular (87 octane), mid-grade (89 octane), and premium (93 octane) gas at a pump

High-end cars (like BMW models) often have advanced engines that run on relatively high compression ratios. These engines thrive on the richness of premium gas, offering better acceleration, fuel economy, and longevity.

Real-world experiences with BMW X1 gas choices

Not convinced by the benefits of premium gas? Let’s check out some real-world experiences from BMW X1 owners!

1. Reduced performance with mid-grade gas

One BMW X1 owner shares he experienced reduced performance after switching from premium to mid-grade gas:

I used the 89 octane for one tank and it didn’t perform as well. I wouldn’t use less than 89 as the owners manuals states it will adjust for 89 but I don’t think it will adjust for less than that.


2. 93 Octane gas

Here’s an X1 owner who tried out Shell’s 93 octane gas:

I just filled up with the new Shell 93 octane gas and I have been getting 3+ miles per gallon more. I haven’t changed my driving habits or anything else except for the gas. If this keeps up, I’ll be using it all of the time.


3. A small difference between premium and regular gas

Lastly, here’s someone who tried out using mid-grade gas to save 70 cents per gallon:

I was recently told by dealer that I could use 89 , midgrade gas. After using exclusively premium for the past 2 years with my other x1 and paying sometimes 70 cents more/gallon, in NYC , I decided to use mid-grade on my new x1. The ride is smooth but I will say not quite the rocket it would probably be with premium.


Can you use ethanol-based fuels for the BMW X1?

Ethanol-based fuels are fuels that contain ethanol, which is a renewable fuel made from biomass. Biomass consists of a variety of plant materials.

It looks something like this:

Corn put into the gas tank filler cap of a car

That’s a joke, of course!

In reality, over 98% of gasoline in the US contains ethanol. The most common ethanol-based fuel is E10, which consists of 10% ethanol and 90% gasoline.

Ethanol-based fuels reduce air pollution, but at the same time, using gas that contains a high concentration of ethanol can damage your vehicle.

E10 is a standard that’s commonly accepted to be safe for most cars on the road today, including the BMW X1.

However, you may occasionally find E15 gas containing 15% ethanol and 85% gasoline. In the US, E15 can be found in 30 states at over 2,400 pumps (source).

E15 is not optimal for the BMW X1, but it won’t be a danger in the short term. However, it can only be used for BMW X1 models from 2009 or newer.

Once you increase the ethanol percentage further, it really won’t be too good for your car.

For instance, E85 gas is also available in some places, but it can only be used for your BMW X1 if you have a flex-fuel kit.

FAQs about gas for the BMW X1

If you have any more questions about which gas type to use for your BMW X1, take a look at these FAQs:

What happens if I accidentally use regular gas in my BMW X1?

Filling your BMW X1 with regular gas once won’t cause immediate harm. However, you might notice reduced performance and engine knocking. To prevent potential issues, it’s a good idea to top off with premium gas on your next fill-ups. Consistently using regular gas isn’t advised, as it can lead to engine issues.

Can I use fuel additives for the BMW X1?

You can use fuel additives or cleaners for the BMW X1. However, it is important to carefully read the manual beforehand and avoid using additives more than twice a year, as this can damage the engine or fuel system.

Can the BMW X1 take 93 octane gas?

Filling up a BMW X1 with 93 octane gas will allow it to extract its maximum performance and engine longevity. However, 91 octane is just as good unless you have a high-performance model.

Final verdict

To summarize: You cannot use regular gas in the BMW X1.

You need mid-grade gas at a minimum, and it’s recommended to use premium gas.

The reason that BMW recommends premium gas has to do with preserving the engine and guaranteeing your X1 continues to drive for years to come.

Sure, in the short run, you might save a bit by using regular gas. But think about the long game: lower fuel efficiency and potential repair bills.

Suddenly, those upfront ‘savings’ might not feel so significant.

If you have any more questions, let us know in the comments!

Gas requirements for other BMW models

Are you interested in the required gas type of other BMW models?

If so, you can find everything you need to know in the following articles:

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