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5.0 L - Real World Fuel Economy

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Old 01-31-2013, 02:15 AM
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With 5500 miles, I am averaging about 16mpg when cruising at 60mph. That is probably not bad at all considering that I have the King Ranch with the Goodyear A/T tires and offroad package. Our roads are also atrocious this time of year and we have tons of hills that you are constantly going up and down.
Old 01-31-2013, 07:23 PM
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Originally Posted by 626
I have a 2012 FX4 SCREW W/3.73, a BAK Roll-X, SOLO dual cat back, 15000km and my combined total according to my computer is 14.5L per 100 running 89 octane. So you are in the ballpark, I find the start stop is a mileage killer and you really gotta go soft on accelerating to squeeze out the best mileage. Forgot I'm running a 5 star 89 Perf tune too. You should get a bit better after a few more oil changes also.

626
So true! I find coasting to a stop sign and red light instead of going gas right to brake is a huge saver. And by the time I'm coasting to the red light it usually turns green!

With 34's and 3.73 scab 4x4 5.0 I'm getting 18.4 50/50 driving which I think is excellent!
Old 01-31-2013, 07:28 PM
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Originally Posted by Wakejunky
I've got a 13' SCREW 6.5' box with Leer cab high shell, 5.0L with 3.73 gears, 3K on odometer Getting about 1-1.25MPG lower than computer average on winter blend fuel.

Winter Blend (California EPA crap)
City/Freeway mixed - 13-15MPG hand calc
- 14-16MPG computer calc
Freeway - 15-16 hand calc
- 16-17 computer calc

Summer Blend ----- ???

I consider myself a conscious MPG driver, easy start offs at lights, 70MPH cruise set on freeway and lots of coasting when coming up to stop lights (enough to **** off people behind me.) I challenge myself to try and get that average MPG up whenever I drive.
Anything over 65 I find to just kill mpg. Try setting it at 65 for awhile. I kno it's tough with everyone passing you
Old 01-31-2013, 07:56 PM
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Too early to tell, but with 312 miles on it so far.....21.2.

Mostly straight streches on roads, not many hills. Never over 60mph.

no interstate driving yet. i'm sure doing 70-75's gonna kill that avg! LOL

Not even broke in yet I guess. But for now, 21.2 looks good on the info screen! LOL
Old 02-01-2013, 04:37 PM
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Over 3K and the lifetime is 15.8 on current tank it shows 16.2. Checking it by hand since new and the millage has stayed steady at 15.5 to 16. On an average 50% of my driving is country/hilly back roads and very little interstate driving. I'm looking forward to summer fuel blend and a nice cross country trip. I'm thinking 19 to 20 shouldn't be an issue as long as I keep the speeds reasonable.
Old 02-02-2013, 09:21 AM
  #46  
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First tank avg. 15.5mpg with about 75% highway. 2013 Screw, 4x4, 3.55 gears. I was hoping for so much more. Maybe when it gets broken in I will be satisfied. I thought it would get close to my 4.6 3V screw that I traded with 33" tires. Wondering if I should have gotten the Ecoboost?!?
Old 02-02-2013, 03:59 PM
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I've been at 13.5mpg in very cold weather, 8 mile commute speeds under 55mph and I drive pretty aggressively.. Worst conditions for gas mileage. Switched to e85 now I'm at 10.9 mpg. Better power though.
Old 02-02-2013, 05:29 PM
  #48  
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Originally Posted by Mikemeek
First tank avg. 15.5mpg with about 75% highway. 2013 Screw, 4x4, 3.55 gears. I was hoping for so much more. Maybe when it gets broken in I will be satisfied. I thought it would get close to my 4.6 3V screw that I traded with 33" tires. Wondering if I should have gotten the Ecoboost?!?
You are using winter blend gas, which has lower mpg, and it takes at least a few thousand miles, on the engine, to reach your best mpg.
Old 02-02-2013, 06:21 PM
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Originally Posted by walc

You are using winter blend gas, which has lower mpg, and it takes at least a few thousand miles, on the engine, to reach your best mpg.
I just moved from Atlanta to Cleveland. What is Winter blend and how do I know if I'm using it? Thanks to whomever answers my stupid question.
Old 02-02-2013, 06:27 PM
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Originally Posted by Mikemeek

I just moved from Atlanta to Cleveland. What is Winter blend and how do I know if I'm using it? Thanks to whomever answers my stupid question.
Ok, so I've read a few articles about Winter blend versus Summer blend but they all concentrate on the pollutants, not what it does to real world mileage. How much does it affect it?


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