MPG Down
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Post Fiend
Joined: Dec 2006
Posts: 9,111
Likes: 3
From: Lexington Mo
MPG Down
First off I have a 2011 F150 4x2 Super Crew, 5.0, and have had the truck for almost 18 months and have always gotten at least 16.5 MPG with a mix of city and hiway driving.
Now I'm only getting 14.8, and that's after a nice hiway run a couple of day's ago. Nothing has changed other than Gas Prices have fallen. And I'm really wondering that with the lowering of gas prices, is our fuel being played with?
Unk Bob
Now I'm only getting 14.8, and that's after a nice hiway run a couple of day's ago. Nothing has changed other than Gas Prices have fallen. And I'm really wondering that with the lowering of gas prices, is our fuel being played with?
Unk Bob
Cargo Master
Joined: Jul 2009
Posts: 2,710
Likes: 77
From: Central Florida
It's normal for the mileage to drop with winter blend fuels. I read on a EPA web site once the winter blend fuel have about 1.7% less energy/gallon than summer blends so i guess it stands to reason your mileage will be about 1.7% lower. Here in the mid-west I tend to see more than a 2% drop in winter. Partly because of fuel and partly because of more idling.
Junior User
Joined: Dec 2013
Posts: 78
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Ditto to what most have said. If you're like me you're taking and extra few minutes to let it warm up and then also it's having to work a bit harder in the cold. I was in the 18-18.5 range up until last week or so when temps stayed consistently cold. Now I'm back down to 17-17.5 on my last tank. It's natural. Nothing to fret over unless it continues into Spring/Summer.
Laughing Gas
Joined: Dec 2010
Posts: 1,200
Likes: 45
From: Timbuk3, MI
IT'S WINTER ...------------------------------
-click- the pic'
Goth 150
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- longer warm-up. *Time it takes for the engine to get-up to operating temp'.
. - lower PSI in the tires. *You did adjust them for the cooler temp's, right?
. - more rolling resistance until the driveline gets-up to operating temp'.
. - seasonal blended fuel. *Which Raleigh/Durham is notorious for.
.
etc., etc., etc..
-click- the pic'
Goth 150
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Post Fiend
Joined: Dec 2006
Posts: 9,111
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From: Lexington Mo
Well the majority have spoken, and have the same answer. I did get me a hiway ride in earlier this week, and seen over 20 mph. That last tank was almost all city driving, and that is sure to nock it down.
Thanks everybody
Thanks everybody
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4wd Low
Joined: Oct 2011
Posts: 11
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My 2011 5.0 had a 2 mpg drop staring last spring. I currently have 48,000 miles. I don't drive as hard as I did when I was younger and was driving a lot of city miles. I know that carbon build up caused "octane creep" by 1) slightly reducing the size of the combustion chamber and 2) acting like a glow plug, both causing pre-ignition. To counter this the knock sensor sends a signal to the ECM to retard the timing, which decreased power and increase fuel consumption. I know from experience that doing a induction system/combustion chamber decarbon cleaning service would make it run like new. Since it costs about $150-$200 to do I decided to try something different. I ran 2 tanks of Shell Premium with the hi tech cleaning additives in it (most Tier One fuels will have this, especially the premiums). I also drove it hard for about 2 weeks. I then went back to regular gas and I swear it is running better and the MPG is back up where it was. Now this is probably not as effective as the Induction System Service but worth a try. Good luck.
Junior User
Joined: Dec 2013
Posts: 78
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I ran 2 tanks of Shell Premium with the hi tech cleaning additives in it (most Tier One fuels will have this, especially the premiums). I also drove it hard for about 2 weeks. I then went back to regular gas and I swear it is running better and the MPG is back up where it was. Now this is probably not as effective as the Induction System Service but worth a try. Good luck.
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Dec 26, 2013 09:43 PM