Ecoboost Owners - Are you filling up with premium fuel?

[C from SF]

XL AWD with payload rating 1,406: 91 octane, eco mode, 80% hwy driving, 65mph average HWY speed, averaging 34mpg. The one test I did for hwy driving only, I got 42.3mpg. A toyota truck mechanic once told me, bigger engines perform better on higher octane. I am getting 650 miles on one tank.

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[Samus L. Jackson]

XL AWD with payload rating 1,406: 91 octane, eco mode, 80% hwy driving, 65mph average HWY speed, averaging 34mpg. The one test I did for hwy driving only, I got 42.3mpg.

How in the world is an ecoboost averaging 34 miles per gallon? How in the world did one of your tests yield 42.3 miles per gallon? This sounds like shenanigans.

 

[dalola]

XL AWD with payload rating 1,406: 91 octane, eco mode, 80% hwy driving, 65mph average HWY speed, averaging 34mpg. The one test I did for hwy driving only, I got 42.3mpg. A toyota truck mechanic once told me, bigger engines perform better on higher octane. I am getting 650 miles on one tank.

lol....the size of the engine has -ZERO- to do with octane requirements.

 

[bgn]

There's absolutely no way the EB is getting 42 mpg on any meaningful drive.

30-32 on the highway when it's flat is not out of the question on the 225/65 tires, especially on XL.

 

[Maverick2022XL]

I use 87 and after turning 4,000 miles it started getting 28/29 mpg on a trip. My overall average is
25.5 combined.

You can get 29 MPG using 87 octane on the combined if you use the ecoboost mode that includes driving uneven terrain. Without ecoboost enabled I get about 25 MPG right now. I am up in the mountains and can get anywhere between 31 - 33 MPG highway with ecoboost on and without about 29 MPG. This is on a Maverick with about 10k miles on it now and 2 oil changes. I'd opine it is pretty much broken in and shouldn't deviate at this point except when the driving conditions are different.

Interestingly enough I had to take a longer drive out the area this weekend to deal with stuff and when I got out of the mountains and into the flat lands I was getting over 35 MPG on the highway and that was going as fast as 75 MPH. Once I got back into the mountains the MPG dropped back to 33ish MPG by the end of the drive.

 

[jewc75]

There's absolutely no way the EB is getting 42 mpg on any meaningful drive.

30-32 on the highway when it's flat is not out of the question on the 225/65 tires, especially on XL.

I get 27 mpg and im always in sport mode and doing 80-85 for my 26 mile drive to work. Im sure if i did 65 in eco mode i could get 35+

 

[Robdisc1]

XL AWD with payload rating 1,406: 91 octane, eco mode, 80% hwy driving, 65mph average HWY speed, averaging 34mpg. The one test I did for hwy driving only, I got 42.3mpg. A toyota truck mechanic once told me, bigger engines perform better on higher octane. I am getting 650 miles on one tank.

On my XLT AWD, I drive about 80% highway and fill up weekly. I avg about 25.5 on the week. A recent 200 mile trip, rolling hills in PA and WV and I was very happy to avg almost 29. I don't see ever doing better unless it is a perfectly flat trek at 65 mph.

 

[Dogcmp6]

XLT 2.0 with FX4...I only run 87, prior to installing a trifold soft cover three weeks ago, I was averaging 26 MPG...after installing the cover, and running through about 6 tanks of gas since (We had a few long trips over the past few weeks)I am not averaging 29.2 MPG...I would be curious to try to run premium for a few tanks, but the amount of driving I do, the extra 5-6 dollars a tank adds up really fast, I doubt the added MPG makes up for the cost.

 

[C from SF]

On my XLT AWD, I drive about 80% highway and fill up weekly. I avg about 25.5 on the week. A recent 200 mile trip, rolling hills in PA and WV and I was very happy to avg almost 29. I don't see ever doing better unless it is a perfectly flat trek at 65 mph.

My driving conditions are ideal: 4 hours nonstop, below 300ft elevation, 55-70 degrees F outside temps so no need for AC or heat, parked behind a Semi breaking the wind for me on the interstate, cruising at a steady 65mph. The Maverick is my weekend ride to the mountain cabin, exclusively. Maverick is getting just about the same mpg as the 2014 corolla I traded in. Love the larger EB tank - I fill up less often with extra 3.6 gallons.

 

[Mavman123]

For the millionth time on this forum, the truck runs 100% fine on regular 87 octane fuel. You will not get any benefit from any higher octane fuel what so ever UNLESS you are towing in a hot climate and therefore your engine temperatures are much hotter than normal operation.

Now we can talk about the mpg gains you will receive from running ethanol free fuel all day. Ethanol has much lower energy density than straight run gasoline, so the normal E10 or E15 fuels will cost you 3 to 8% mpg losses. Typically the cost of ethanol free fuel far exceeds the gain in efficiency so it doesn't matter.

However the energy density for all octanes of
gasoline are equivalent. 87, 89, 93 will all give you the same mpg in your Mavericks.

For what it's worth, I only buy 87 octane 10% ethanol gasoline (the gas any regular old gas station has) and I'm currently averaging 30 to 31mpg hand calculated at the pump and by the maverick computer.

 

[jewc75]

Until you monitor knock you are just assuming it runs fine.

 

[dalola]

For the millionth time on this forum, the truck runs 100% fine on regular 87 octane fuel. You will not get any benefit from any higher octane fuel what so ever UNLESS you are towing in a hot climate and therefore your engine temperatures are much hotter than normal operation.

Now we can talk about the mpg gains you will receive from running ethanol free fuel all day. Ethanol has much lower energy density than straight run gasoline, so the normal E10 or E15 fuels will cost you 3 to 8% mpg losses. Typically the cost of ethanol free fuel far exceeds the gain in efficiency so it doesn't matter.

However the energy density for all octanes of
gasoline are equivalent. 87, 89, 93 will all give you the same mpg in your Mavericks.

For what it's worth, I only buy 87 octane 10% ethanol gasoline (the gas any regular old gas station has) and I'm currently averaging 30 to 31mpg hand calculated at the pump and by the maverick computer.

You're forgetting about the folks who enjoy the quicker acceleration from that 15-20 HP bump that the EB will yield with 93 vs 87.

 

[D&Dmav]

In my experience all forced induction engines will run better (performance) with higher octane rating. This is especially true during hot weather. I try to avoid ethanol when ever I can.

 

[Mikeysd]

ok so what is considered hot weather for the truck?

 

[Samus L. Jackson]

Death Valley and/or Hell itself.

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