3.5 Ecoboost Life Expectancy [Average Miles Explained]

3.5 ecoboost dashboard showing 30 000 miles

One of my favorite engines for an F-150 is the 3.5 EcoBoost because it strikes a balance between providing power and maintaining good fuel economy.

This engine outputs 375 horsepower and 470 pound-feet of torque while creating an average fuel economy of 18 MPG/25 MPG for city and highway respectively.

But how reliable are these engines? how long do they last? this article will answer exactly that.

3.5 Ecoboost Overview

Now, before we dive into how long these engines last, let’s take a quick look at the engine itself.

The Ford F-150 3.5 EcoBoost is a powerful and efficient V6 engine that was first introduced in the 2011 model year. This engine is built around the Duratec 35 engine block, which is also known as the Ford Cyclone V6 engine.

The EcoBoost block is made of all aluminum and features an open-deck design with high-strength steel sleeves. This engine also features forged steel I-beam connecting rods and a forged steel crankshaft with 6-bolt main bearing caps, which improves the engine’s durability.

The 3.5 EcoBoost is designed to deliver power and torque that is consistent with those of larger-displacement, naturally aspirated engines while achieving better fuel efficiency and lower greenhouse emissions.

This engine has a compression ratio of 10.5:1, except for the 3.5L EcoBoost High Output for the Ford Raptor, which remained at 10.0:1. The engine’s variable camshaft (VCT) design was also modified for improved durability.

This engine is used in a variety of Ford vehicles, including the Ford Explorer, Ford Expedition, Ford Flex, Ford F-150, and Ford GT. It’s particularly popular among truck enthusiasts as it has ample aftermarket support. With a simple tune, it is possible to add over 80 horsepower and 80 lb-ft of torque to an otherwise stock engine.

With more advanced modifications such as intercoolers, intakes, exhaust systems, and even turbo upgrades, it is possible to push the engine to the 600-horsepower mark.

3.5 Ecoboost Life Expectancy

Now, let’s look at the lifespan of the 3.5 Ecoboost engine.

After asking many F150 3.5 EcoBoost owners and from my experience as a former tech, it seems that the average lifespan of this engine is between 200,000 and 300,000 miles.

Before the motor starts to have any serious problems, however, the main problem is the turbo going out a lot sooner than you’d expect (150 000- 200 000 miles)

Factors Affecting the Life Expectancy of a Ford 3.5 Ecoboost Engine

From my experience, engines don’t wear out just because they are old or have a lot of miles on them. Of cause that is one factor but there are several other factors that affect how long a 3.5 EcoBoost engine will last, these include

1. How Often do You Service the vehicle

One of the most crucial things that directly affect the engine, is the oil and filter interval. If the engine is not serviced regularly, it will wear out faster than expected.

I recommend changing the oil every 3000-6000 miles at least, but if you drive in a lot of stop-and-go traffic where there are high temperatures then it might be necessary to change it every 3000-4000 miles using a full synthetic quality oil.

2. Driving Habits

Another important factor that affects how long a 3.5 EcoBoost engine will last is your driving habits.

The way you drive can have a direct impact on how long your vehicle will last.

If you drive aggressively or run the engine hard, then this will wear out certain components much faster than normal. If possible, try to avoid driving in heavy traffic or at high speeds for extended periods of time.

3. Towing Frequency

Although the f150 is a great truck for towing, it’s important not to abuse the vehicle by doing it too often.

If you are planning on towing a large load, then be sure to use an appropriate weight rating and properly set up your vehicle with all of the proper equipment.

4. Where you drive the Truck

The final factor that can affect the lifespan of your vehicle is the operating conditions and environments it’s exposed to. If you live in a hot, humid climate then this will cause more problems with rust and corrosion than if you lived in a dry desert climate.

If you plan on driving the truck in an area with a lot of sand, mud, or salt water then it will be exposed to more wear and tear than if you drove it on paved roads. The key is to keep your vehicle maintained well so that it lasts as long as possible.

How to Make a 3.5 Ecoboost Engine Last Longer

Now, that you know the main factors that can affect the overall lifespan of the 3.5 EcoBoost engine, let’s talk about how to make it last longer.

  1. Do Oil Changes Frequently (3 000 – 5 000 Miles)
  2. Replace Filters Regularly
  3. Avoid going hard on the Accelerator
  4. Only Tow what you need to tow
  5. Regularly check your fluid levels
  6. Follow what your user manual says


Recent Posts