What's the Real Fuel Economy of the 2.8 Duramax?

Questions and Support
1

I’ve been doing some research on the 2.8L Duramax diesel engine found in the Chevrolet Colorado and GMC Canyon, and I’m curious about its fuel economy.

Fuel Economy Overview

I’ve seen various figures tossed around, but I’d love to get a clearer picture from actual owners. How does it perform in day-to-day driving? What kind of mileage are you all getting on the highway versus in the city?

Factors Affecting Fuel Economy

I understand that several factors can impact fuel efficiency, such as:

  • Driving Habits: Do you primarily drive in the city or on the highway?
  • Load: Are you often towing or hauling heavy loads?
  • Maintenance: How regularly do you maintain your vehicle?
  • Tire Pressure: Are your tires properly inflated?

Real-World Experiences

If you have a 2.8 Duramax, I’d appreciate hearing about your experiences.

  • What’s the best fuel economy you’ve achieved?
  • Any tips for getting better mileage?
  • How does it compare to what the manufacturer claims?

Conclusion

I’m considering whether to go for the Colorado or Canyon, and fuel economy will definitely play a role in my decision. Your insights will be really helpful!

Thanks in advance for any information you can share!

3 Likes
2

I’ve been driving a 2.8 Duramax in my Colorado for about a year now. I’m averaging around 24 mpg combined. Mostly highway driving, so that helps a lot. Anyone else seeing similar figures?

3

I have a Canyon with the 2.8, and I’m getting about 22 mpg in mixed driving. I think a lot depends on your driving style. If you’re easy on the throttle, it definitely helps!

4

I’ve seen figures anywhere from 20 to 28 mpg! It all depends on the load and terrain. Towing does hit your numbers, though.

5

That’s true! I usually drive unloaded, and that boosts my average to about 26 mpg. But throw in a trailer and it drops noticeably!

6

I keep track of my fuel economy, and I’ve noted that my 2.8 Duramax gets around 23 mpg on the highway when cruising at a steady speed. It really struggles with stop-and-go traffic, though.

7

Stop-and-go can really hurt. I feel like my fuel gauge drops on the first stop! My average is around 20 mpg overall. Real-world conditions really make a difference.

8

I’m new to the Duramax family, but I just got a 2021 model. So far, I’m at 21 mpg under regular conditions. Is it normal for it to take a bit to break in?

9

Yes, it can take a while to break in! I wouldn’t worry too much; I’ve heard others mention low fuel economy in the first few thousand miles. Keep track of it!

10

I always try to drive conservatively, but I still only get about 19 mpg when towing. What can people recommend for better mileage when loaded?

11

Take it easy on the hills and keep that speed minimal! I also downshift when going uphill to help maintain speed without flooring it.

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12

Honestly, I just laugh at my Duramax sometimes! I thought I’d get much better mileage, but the 2.8 just loves to drink diesel! Has anyone else felt the pain?

13

You’re not alone! It’s a bit surprising considering all the hype about diesel engines!

14

Reflecting on my experiences, I realize that each trip varies. Sometimes I get excited and speed, and that definitely wrecks my mileage. Anyone else see their mpg change drastically just based on how they’re driving?

15

I’ve heard that keeping up with regular oil changes can really help fuel economy in the 2.8 Duramax. Any thoughts?

16

Absolutely! Regular maintenance like oil changes is crucial. I’ve also noticed that maintaining correct tire pressure makes a difference. A bit of air can improve your mileage!

17

I’ve tried a few mods, like a cold air intake. It seems to boost performance and slightly improve MPG. Worth a try if you’re into that!

18

That sounds interesting! Do you have a specific brand you recommend for the cold air intake?

19

I’ve been using a K&N filter for my cold air intake. Noticed a noticeable change! Plus, it lasts longer without needing replacement.

3 Likes
20

Is there a sweet spot for maintaining speed? I typically drive around 65-70mph, but I’m wondering if slower speeds would help with fuel economy.