3.5 Ecoboost 87 Vs 91 Octane

Last Updated on by David Jon

If you’re wondering what kind of gas to put in your 3.5 Ecoboost, you’ve come to the right place. In this article, we’ll compare 87 octane and 91 octane gasoline to see which is best for your car. We’ll also discuss whether or not premium gas is worth the extra money.

There are two main types of gasoline available for purchase in the United States – 87 octane and 91 octane. So, what’s the difference? And which should you use in your vehicle?

The octane rating is a measure of a fuel’s ability to resist “knocking” or “pinging” during combustion, caused by the air/fuel mixture detonating prematurely in the engine. In simple terms, higher octane fuels resist knocking better than lower octane fuels. Detonation can cause serious engine damage, so it’s important to use the correct fuel for your vehicle.

Check your owner’s manual to see what type of fuel is recommended – typically, most vehicles will run just fine on 87 octane gas. However, if your vehicle has a high-performance engine or is designed for towing heavy loads, 91 octane gas may be required in order to prevent knocks and pings. At the end of the day, using the wrong type of gasoline isn’t going to do any major damage to your car.

However, it will likely result in decreased performance and fuel economy. So it’s best to just stick with the recommendedoctane rating for your particular vehicle.

3.5 Ecoboost 87 Vs 91 Octane

Credit: www.reddit.com

Can I Run 87 Octane in My 3.5 Ecoboost?

If you have a 3.5 EcoBoost engine, you can run 87 octane gasoline in it without any problems. The EcoBoost engine is designed to be able to run on lower octane gasolines without any issues. So if you’re looking to save some money at the pump, feel free to fill up with 87 octane gasoline in your 3.5 EcoBoost engine.

Do Ecoboost Engines Need Premium Fuel?

EcoBoost is a trademarked name for turbocharged, direct-injection petrol engines produced by Ford. The objective of the EcoBoost technology is to improve fuel economy while maintaining performance and emission standards. The first generation of the EcoBoost engine was launched in 2009 on the Ford F-150 truck.

It was a 3.5-litre V6 engine that produced 365 horsepower (272 kW) and 420 lb⋅ft (569 N⋅m) of torque while consuming 26% less fuel than the larger 5.4-litre V8 it replaced. The second generation of the EcoBoost engine was introduced in 2013 on the Ford Fusion sedan. It was a 1.6-litre four-cylinder engine that produces 178 horsepower (133 kW) and 184 lb⋅ft (250 N⋅m) of torque while consuming up to 20% less fuel than the larger 2.5-litre four-cylinder it replaced.

EcoBoost engines are designed to run on regular unleaded gasoline; however, premium unleaded gasoline can be used if desired without any ill effects. In fact, using premium unleaded gasoline may slightly improve fuel economy and performance due to its higher octane rating which allows the engine to run at slightly higher compression ratios without knocking.

Does 87 Or 91 Make a Difference?

When it comes to octane ratings, 87 and 91 are very close. In fact, they’re only four points apart on the octane scale. So what does that mean for your car?

For starters, higher octane fuel is less likely to knock or ping during combustion. That’s because the higher the octane rating, the higher the temperature at which fuel will ignite. Detonation knock is a knocking noise that you might hear coming from your engine when you use lower quality gasoline.

It happens when the air-fuel mixture in your cylinders ignites too early. When this happens, your engine’s pistons receive a shock as they try to push against the already burning mixture..

Knocking can cause damage to your engine over time, so it’s best to avoid it if possible. However, if you do find yourself using lower quality gas occasionally, don’t worry too much about it. Your car will be able to handle a little knocking without any serious problems.

So should you use 87 or 91 octane gasoline? If your car is designed for 87 octane and you use 91 octane, you’re not doing any harm. In fact, you might even get slightly better performance out of your car since 91 octane burns cooler than 87 octane.

Is the 3.5 Ecoboost Good on Gas?

The 3.5 EcoBoost is a great engine when it comes to fuel economy. It’s one of the most fuel efficient engines on the market, and it’s able to get great gas mileage even when towing or hauling heavy loads. When properly tuned, the 3.5 EcoBoost can get up to 30 mpg on the highway, which is very impressive for an engine of its size and power.

If you’re looking for an engine that’s good on gas, the 3.5 EcoBoost is definitely worth considering.

What octane does the F150 EcoBoost (or Powerboost) run best on? 87/91, etc. And what about E85/E15??

Recommended Fuel for 3.5 Ecoboost

If you’re the owner of a 3.5 Ecoboost engine, then you know that finding the right fuel is important in order to keep your vehicle running smoothly. Here are some recommended fuels for your 3.5 Ecoboost engine: – 87 octane regular unleaded gasoline

– 89 octane premium unleaded gasoline – 91 octane super premium unleaded gasoline – E85 ethanol flex fuel (for certain vehicles)

As far as which brand of fuel to use, that’s up to you. However, it’s important to make sure that whatever brand you choose, the fuel meets the minimum octane rating required for your engine. Otherwise, you could damage your engine or void your warranty.

2021 Ford F150 3.5 Ecoboost Fuel Type

The 2021 Ford F-150 will offer a 3.5-liter Ecoboost V6 engine as its base powertrain. This twin-turbocharged engine will produce 400 horsepower and 500 lb-ft of torque. It will be paired with a 10-speed automatic transmission.

The 3.5 Ecoboost will be the only engine available on the XL and XLT trim levels. The 3.5 Ecoboost is a downsized version of the twin-turbocharged V6 that has been available in the Ford F-150 since 2011. It’s one of the most popular engines in the F-150 lineup thanks to its combination of power and fuel economy.

The 3.5 Ecoboost is expected to return 19 mpg in the city and 26 mpg on the highway in 2021, making it one of the most fuel efficient trucks on the market. If you’re looking for maximum tow rating, you’ll want to opt for either the 5.0 liter V8 or one of the diesel options – both offer more torque than the 3.5 Ecoboost (the 5.0 liter produces 430 lb-ft while diesels max out at an impressive 480 lb-ft).

3.5 Ecoboost 87 Octane

If you’re looking for a little more power under the hood, the 3.5L EcoBoost engine is a great option. It’s available on a variety of Ford models, including the F-150, Explorer, and Edge. And while it requires premium fuel, 87 octane will suffice in a pinch.

Here’s what you need to know about this high-performance engine. The 3.5L EcoBoost engine was first introduced in 2009 and is still going strong today. It’s a twin-turbocharged V6 that delivers 365 horsepower and 420 lb-ft of torque.

That’s plenty of power for towing or hauling heavy loads. The EcoBoost engine is also known for its exceptional fuel economy. When properly equipped, the F-150 can get up to 26 mpg on the highway with this engine.

If you’re considering an EcoBoost-powered Ford vehicle, be sure to use premium fuel whenever possible. While 87 octane will work in a pinch, it’s not ideal for long-term use. This lower grade of fuel can negatively impact performance and fuel economy over time.

87 Octane Tune 3.5 Ecoboost

If you’re driving a 3.5 Ecoboost and want to get the most out of your engine, you’ll need an 87 octane tune. This will allow your engine to run at its optimal performance levels, and help to prevent any knocking or pinging that could damage your engine. There are a few things to keep in mind when getting an 87 octane tune for your 3.5 Ecoboost.

First, make sure that you use good quality fuel – lower quality fuel can cause problems with the tune and actually damage your engine. Second, be aware that this type of tune will put more strain on your engine, so it’s important to have all of the necessary maintenance performed before hand. And finally, make sure you follow the directions for the installation carefully – if something goes wrong, it could void your warranty or even cause serious damage.

If you’re looking for more power and better performance from your 3.5 Ecoboost, an 87 octane tune is definitely worth considering. Just be sure to do your research and take care of everything beforehand so you can enjoy the ride without any issues!


If you’re debating whether to use 87 or 91 octane gasoline in your 3.5 Ecoboost Ford, the answer is simple: 91. The higher octane rating will help prevent engine knocking and improve performance. It’s worth the few extra cents per gallon to fill up with 91 octane gas.

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