Could the 5.0L V8 Fuel Economy Equal the 2.7L EcoBoost V6?

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2015 F-150 XLT Review - IMG_1762

Ford’s new 2.7L EcoBoost V6 that first appeared in the 2015 Ford F-150 is a peach of an engine. It’s small size hides the big grunt, and it returns great fuel economy. But as we know about fuel economy, your mileage may vary. According to a recent report from Edmunds.com, the 2.7L EcoBoost isn’t any more fuel efficient that the 5.0L Coyote V8.

Basically Edmunds.com took their long-term F-150 and tried to find a comparable F-150 with the other engine. They then performed a series of driving tests to see which achieved the better mileage. They then noted that mileage and compared it to the EPA estimates on the window sticker.

Over the entire test, the 5.0L Coyote V8 F-150 19.3 mpg and the 2.7L EcoBoost bested it by 0.2 mpg with a 19.5 mpg average. The 5.0L’s performance was a full 2.3 mpg better than the window sticker average. The EcoBoost’s was 0.5 mpg less than the sticker.

F-150 EcoBoost 1

This all seems cut-and-dry, but if you dig a little deeper there’s a little more to it. While both trucks were as nearly identical as they could be, the 5.0L V8 had the 3.31 gears and the EcoBoost had the 3.73. I’ve driven a lot of different trucks over the past year or so, and the gearing makes a big difference in fuel economy, especially on the highway. Edmunds.com‘s test did skew more towards highway driving than city driving.

During one of the test loops, both trucks had no wind on a big uphill leg of the trip, but both trucks had a strong headwind on the downhill. While both trucks had to experience it the same, the test would be more accurate if a tailwind was pushing them up the hill. There’s a reason why the Guinness Book of World Records has motor vehicles go in both directions and take an average. It’s too weed out any discrepancies due to things like this.

On our own test loop with the 2.7L EcoBoost I achieved 24.0 mpg. That was with the middle 3.55 gears.

2015 F-150 in Guard Green

If all things were equal, and the 5.0L returned the same fuel economy as the 2.7L, then I’d have no problems saying that you should all go out and buy the Coyote V8 version right away. But gearing and other factors do come into play. I would trust the results Edmunds.com achieved, but only as a data point in a much larger discussion of overall fuel economy.

Remember also that above the base V6, the EcoBoost 2.7L V6 is just a $795 option. The 5.0L V8 is $1,595. That’s a big difference in price for what amounts to the same fuel economy. Though, the 5.0L does get you another 1,500 lbs of towing capacity.

My advice? Get the engine you like and is in your budget. I really like the 2.7L for what it is, and would recommend it for those looking at the XLT trim F-150. The Coyote is great, and if you want a snow plow it’s the engine to get.

If you do end up with an EcoBoost, or currently have an EcoBoost, and want better fuel economy remember that when a turbo engine is under load (or on boost), the fuel economy can drop. Sometimes that drop can be significant.

What do you think? Let us know over in the forums!

via [Edmunds.com]

Chad Kirchner is a regular contributor to Corvette Forum and Ford Truck Enthusiasts, among other auto sites.

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