Winter Fuel Economy

[17022]

Raptor is a windsail. MPG falls like a rock over 60mph. 10-20 knot headwind will make a big difference. Makes sense to look at averages over 100s of miles, not just an instant reading that could be influenced by a lot of external factors.

I was saying I reset the counter to remove the side roads and constrain it purely to the 70 miles of highway.


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[17022]

I’m in VA and noticed this last winter too. Mine drops like a rock but comes back up in the summer.

This is what I was hoping to hear. Prior to discovering this winter phenomenon I thought something was wrong with my truck.


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[smurfslayer]

I usually get the best economy to / from and in the Outer Banks. You’re basically 60mph and under and on Island Time(™) so if you’re in a hurry, you’re the only one. Come to think of it, I’ve never equaled that in the cold temperatures... best I’ve gotten was an indicated 20.5, which turned out to be about 20.2 actual doing the math.

 

[sean1968]

Count your blessings I’m getting 13.5 mpg hwy at 75mph with some hills.


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[FordPerf Addict]

average of 14 mpg, computer says 15.5

Lots of highway driving. 75 mph on half and 68-72 on the other half of my drive. Easy on the pedal in the city as well with lots of 50-60mph roads.

Seems to be very sensitive to wind and grade, when boost kicks in mpg goes way down. Come to think of it I do use auto start a lot, I bet that accounts for at least .5mpg

I personally thought this thing would do better, I have 3,500 miles.

Will it get better as it breaks in? Also I’ve been using 93 and 91 fuel



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[wjn]

Everyone is experiencing it. This is completely normal and happens to every gasoline powered vehicle out there. Cars will run rich until they are warmed up. Some more rich than others. Forced induction cars will run richer than NA cars.

Air density is a variable too. Given the same air pressure, difference between 0 and 25 Degrees C is around 10%.

 

[HeavyAssault]

This is going to sound crazy.....try blocking a portion (1/4, or 1/3) of the intercooler. Using cardboard is cheap, and easy to fit.

 

[Fastback89]

Mine is stuck at 15.0 for months, have only used reg 87 octane.

 

[Trailmaker]

The biggest thing you guys are missing is tire pressure, leave your tire pressure gauge on and you’ll notice cold days it’s roughly 4 psi to 6 PSI it lower.

Those of you that never ran 35” tires, this will be new you. Those of you that are in below freezing weather, will see 6-8 lbs less. Do not add air or you will be overflatted at the end of the day.

 

[evan9r]

I have noticed this too. My mpg is consistently 1.5-2 mpg worse when the temperature is 50 degrees or colder versus when the temperature is 70 degrees. I've seen this happen in one day and the only change was the temperature. Cold in the morning and warm in the afternoon is pretty common here in SC so temperature varies quite a bit and definitely has an affect on mpg with these trucks. I do have SP542 plugs and wonder if that makes the problem worse. I may swap the originals back in just for fun to see if it makes a difference.