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2015 Edge FWD with 2.0 Ecoboost - Premium Fuel?


garrett62

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cab2g....where would you be getting this information from?

 

Thanks

I guess I misread this:https://media.ford.com/content/fordmedia/fna/us/en/news/2015/02/06/performance-and-power--2015-ford-edge-sport-certified-as-highest.html

The standard twin-scroll 2.0-liter EcoBoost four-cylinder is rated at 245 horsepower at 5,500 rpm and 275 lb.-ft. of torque at 3,000 rpm (on 93-octane fuel), and returns EPA-estimated fuel economy ratings of 20 mpg city, 30 mpg highway and 24 mpg combined with front-wheel drive and 20 mpg city, 28 mpg highway and 23 mpg combined with all-wheel drive.

It's confusing that they mention 93 octane in the sentence and then neglect to mention that another spec in the same sentence was determined using 87 octane.
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As an odd sidenote, no premium fuel is required or even recommended, yet the engine’s power and torque ratings, of 245 horsepower, and 275 pound-feet, respectively, are achieved on top-tier 93-octane fuel. Torque remains the same on the 87-octane that’s common at U.S. pumps, but horsepower is approximately ten percent lower—think around 220 hp.

From http://www.thecarconnection.com/news/1097209_2015-ford-edge-first-drive/page-2

 

So there you have it. You'll get 220HP and 275 lb/ft torque if you use 87 octane.

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  • 3 weeks later...

In the 2015 Edge brochure, under "Estimated Fuel Consumption Ratings" on page 8, although all the figures are still xx.x in my edition (Canadian), there are 2 sections for the 2.0L EcoBoost 4-cylinder: with and without start-stop. Has anyone seen updated figures that distinguish between the two?

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  • 2 weeks later...

That's because 87 octane fuel has slightly higher energy content than higher octane premium fuels. You will always get better fuel economy on 87 (or 85 depending on altitude), as long as the engine tuning and design accounts for it. Modern vehicle knock sensors signal the CPU to pull timing so as not to preignite.

 

Since 87 is more volatile than premium fuels, it tends to pre ignite, so premium has additives that reduce it's volativity, allowing more timing, so you can get more HP from premium. You gain more HP from more timing than you give up with lower energy content premium fuel.

 

I understand this is about opposite from what most on here have been told their whole lives. We have always been told Premium is better....marketing.

Edited by RJG
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