The Definitive Ecoboost vs GT gas mileage thread

[Bikeman315]

And this is why W3rkn hates you. You just refuse to let him have a win.

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[Hinzel]

doing mostly city driving, i averaged 19 mpg on my EB over 10k miles

 

[TicTocTach]

18 months of owning my '18 EBPP A10/3.55, she has failed to amaze me with her mileage, but has been consistently fun to drive. Daily commute is ~13 miles with the first and last mile in town, 11 miles on the highway at 80mph or 5mph... I track every fillup since new (7 miles on the odo when I bought her). At 18,300 miles and 61 tanks of 93 octane gas:

Average mileage = 22.39 mpg
Highest mileage = 28.45 mpg (300+ mile roadtrip to San Antonio & back)
Lowest mileage = 19.55 mpg (screwing around in different drive modes)

Driving in Sport+ lowers mileage by ~2 mpg, so I typically drive in Normal mode on my commute with a shift to Sport in town. She likes to run at 80+, but mileage is significantly better at 70mph. There just aren't many highways in TX where the speed limits are 70 and traffic isn't moving at 80. Can't bring myself to putter along at 70 when everyone else is moving at 75+...

 

[Linkster1666]

With not that many miles and just about half the miles highway, the last trip to Vegas was 24.8 mpg.

 

[Faceme]

Cruising on the highway i get around 26~28.
City around 10 becuase i like to gun it at practically every light. Lol

16 GT. Stock tune

 

[Ebm]

I've got over 75k miles on mine and I'm still trying to figure out my gas mileage. Guess I'm not trying hard enough.

 

[boos550t]

I log my MPGs every 5-6000 miles for oil change intervals on trip B and i get a consistent 16mpg with about 70/30 city/highway split with 3.73 pp

I don't even drive that aggressively. I use the engines compression to decelerate, coast to a stop (in hopes the light turns green so I don't have to start in 1st again) and I don't really rev it out past 3.5k on my commute. But I still get 16-17mpg.

In my ecoboost i averaged about 21-22mpg with the same commute and city highway splits.
I did take a long 800 mile road trip and it averaged about 38mpg on the highway though

My commute is about 12 miles (24 total) everyday.

The highest MPG reading i've ever got on my GT was 22mpg

 

[FreePenguin]

I get 32-35mpg Highway, but I’m manual with 3.31 non pp. city and combined I stay around 27mpg

I read a comment saying a guy lost 2-3mpg once he installed gt350 spoiler, (which I have) I installed it immediately so cant I can’t comment on mpg loss

 

[The_Phantom]

2019 GT/CS A10 Coupe
Best Average MPG - 22.5MPG
Typical Average MPG - 18 MPG
Worst Average MPG - 16 MPG

All on Shell Nitro 93 Octane fuel.

 

[Cobra Jet]

What I’d like to know is this:

Is the total “estimated” MPG on the dash cluster a combo/average of Trip 1 and Trip 2? Does anyone know exactly how that “calculator” is coming up to the main MPG figure?

———
Since taking ownership of my 2018 EB Prem w/PP w/10R80 in Feb 2018 - my MPG has been a consistent 28.9 to 29.6 MPG. Those figures are totally accurate and NOT “adjusted” by dickering with the Trip resets just to get a higher MPG to gloat about...

The change in MPG I have to contribute to seasonal gasoline formula changes and/or the occasional Drive Mode selection of Sport+.

I’ve noticed my MPGs always drop after Sept/Oct time period.

Tire PSI is always spot on at 32 cold and 35 hot.

My distance driven each week is 500+mi. My daily route is 85% rural (no stops, low to almost no traffic) and 15% city (dense traffic and many traffic lights).

Fueling is always at Gulf gas station and selection is always 89 octane (mid grade).

Oil is changed every 5,000 miles along w/ tire rotation. Believe it or not, my PZeros have over 33k on them now and there’s still decent tread left - prob could get them to 40k or better... LOL.

I’ve used 92 or 93 octane in the past and to be honest, with the same driving characteristics and route, the car always seems to lose at least .3-.5 MPGs... that may seem crazy to some, but it happens every time. It seems to be happy on 89 octane for daily commuting, so that’s what I keep in it (despite what others may think or say).

 

[The_Phantom]

I’ve used 92 or 93 octane in the past and to be honest, with the same driving characteristics and route, the car always seems to lose at least .3-.5 MPGs... that may seem crazy to some, but it happens every time. It seems to be happy on 89 octane for daily commuting, so that’s what I keep in it (despite what others may think or say).

Just want to mention that the owner's manual agrees with you. 87/89 is just fine, 91 or higher is recommended for maximum performance. (On the GT anyway...not sure on EB)

 

[boos550t]

What I’d like to know is this:

Believe it or not, my PZeros have over 33k on them now and there’s still decent tread left - prob could get them to 40k or better... LOL.

Aren't the pirellis on the ecoboost all seasons?

 

[Cobra Jet]

Aren't the pirellis on the ecoboost all seasons?

Nope - not on the EB w/PP.... none of the PP equipped S550’s come with All Seasons.

 

[MaskedRacerX]

99% of my driving is around town, in Sport+ mode, top down, and running ethanol.

I have no idea about my MPG, but it's not good

 

[nathanks]

I don't think mine is near as good as most of you are getting. When I fill up I've never seen the miles to empty read more than 211.

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