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  #31  
Old 01-13-2013, 11:34 AM
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My 2012 Crew cab, shrt bed 4x4, 3.55, 6.7L with 989 miles on it has been showing 15-15.5 in the city and 15-17.5 on the highway. It's a little strange. I reset the mileage computer and Trip B at top off and took two different highway trips. On both, it ran at 15-15.5 for the first 100 miles, then the average started coming up and settled in at around 17. It also seems that it is worse driving in rain, even though I drive slower. Anyway, it's too early for me to tell, but wanted to share what I've seen.

I've heard that with ethanol in gasoline, you get a direct penalty in mileage for every percentage that is ethanol. (10% eth results in 10% mileage decrease). What is the effect of biodiesel? I would think it would still perform well. The BTU content of veg oil is similar to diesel, isn't it?
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  #32  
Old 03-31-2013, 08:42 PM
offroad4x offroad4x is offline
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Driving my new F350 6.7L, 3.73 DRW Lariat, just completed round trip highway driving from Ithaca to NYC. Using cruise control i got about 17.5 mpg with 65mph. At 70mph efficiency dropped to 15.5mph. On return trip did NOT use cruise control. Efficiency was 18.3mpg for most of the highway. On steep hills, mileage dropped to 17.8mpg. Driving thru town at 45mph, I did get 21mpg but could not repeat this performance ?????. Using cruise control, the turbocharger seems to engage at higher rpm to keep cruise set-point speed.
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  #33  
Old 03-31-2013, 09:10 PM
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Originally Posted by offroad4x View Post
Driving my new F350 6.7L, 3.73 DRW Lariat, just completed round trip highway driving from Ithaca to NYC. Using cruise control i got about 17.5 mpg with 65mph. At 70mph efficiency dropped to 15.5mph. On return trip did NOT use cruise control. Efficiency was 18.3mpg for most of the highway. On steep hills, mileage dropped to 17.8mpg. Driving thru town at 45mph, I did get 21mpg but could not repeat this performance ?????. Using cruise control, the turbocharger seems to engage at higher rpm to keep cruise set-point speed.
WOW! That is great milage. We both have the exact same truck and I got that kind of milage after 5,000 miles and I was told it gets a little better after 11,000 miles and then settles in. I now have 6600 miles and I average 15.7 to 16.4 half city and half highway. I keep it at 65 because faster than that you do norice a significant decrease. I guess they made the gearing for folks that tow and don't speed.

I know they fill the tires up with nitrogen gas at the factory and I was told that gives you a little better milage but I don't think it is measurable.
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  #34  
Old 03-31-2013, 09:17 PM
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Originally Posted by ftodaro View Post
I notice when the indicator comes on that its cleaning the exhaust, that my mileage drops while that procedure is in progress, you might look to see it that if working correctly.

Frank
OH Yeah! When it says "Exhaust filter cleaning" my milage drops doe to 12 to 13 mpg. I have not researched why that is but hopefully somebody that works from Ford can tell us. It is not in the owners manual that is for sure.
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  #35  
Old 03-31-2013, 10:53 PM
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Quote:
Originally Posted by 429martin View Post
OH Yeah! When it says "Exhaust filter cleaning" my milage drops doe to 12 to 13 mpg. I have not researched why that is but hopefully somebody that works from Ford can tell us. It is not in the owners manual that is for sure.
Because your truck is using extra fuel to burn off the soot in the exhaust filter
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  #36  
Old 03-31-2013, 11:14 PM
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Originally Posted by 2ndStroke View Post
Because your truck is using extra fuel to burn off the soot in the exhaust filter
I figuered that much but than i wondered if it uses more fuel wouldn't create more soot?
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  #37  
Old 04-01-2013, 09:11 PM
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Newb here. I commute highway/city 30/70 and getting 19 mpg for first 1000 miles by the computer and by my own calculations. I drive very conservatively. Pretty impressive considering 5.4 got about 17.5.
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  #38  
Old 04-01-2013, 10:33 PM
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Originally Posted by coachmajor View Post
Newb here. I commute highway/city 30/70 and getting 19 mpg for first 1000 miles by the computer and by my own calculations. I drive very conservatively. Pretty impressive considering 5.4 got about 17.5.
How is your truck set up? DRW or SRW, 4x4 or 2wd, etc...
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  #39  
Old 04-02-2013, 01:23 AM
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2013 SRW, 3.55, 4x4 with 3K miles on it: 20/80 city/highway (and 40% of highway being rolling hills) getting a little over 17 mpg per hand calculation (magic-meter will state a little over 18). Not pulling at this point.
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  #40  
Old 04-02-2013, 05:29 AM
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Originally Posted by 429martin View Post
How is your truck set up? DRW or SRW, 4x4 or 2wd, etc...
My bad. 4x4, SC, 3.55, auto, srw.
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  #41  
Old 07-06-2014, 12:57 PM
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tuner

I was curious what tuner u installed to get that kinda mileage out of that truck. I'm in between a diesel or gas
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  #42  
Old 07-06-2014, 01:14 PM
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I am not using a tuner it is completely stock. The big question between diesel or gas is if you will get your money out of it. Calculate the amount of miles you will be driving per year and how many towing. Diesel will get you about 20% to 30% better fuel economy. I like the torque and resale value of a diesel compared to gas and that was enough for me to fork our an extra $8,000.
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Last edited by 429martin; 07-14-2014 at 01:11 PM. Reason: spelling
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  #43  
Old 07-13-2014, 09:32 PM
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3.5L vs 6.7L

Am considering selling my '13 F150 4WD SuperCrew with 3.5L EcoBoost. I bought it with the intention of getting it to pull my first 5th wheeler. After pulling a 26' travel trailer 1833 miles to Wisconsin last month & getting 6.7 mpg going up and 8 mpg coming back, I believe I can justify moving to an F250 6.7 diesel. Empty, I'm averaging 15.7 city/hwy driving with the 3.5, 17-18 mpg highway driving 65-ish all on premium fuel. The truck is my everyday driver and when the 5th wheel arrives soon, I'll be touring the country 8 months of the year. I love the 3.5 power, but not the mpg's. Doing the math, it appears the fuel will offset the cost of the diesel. Any comments would be greatly appreciated.
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  #44  
Old 07-14-2014, 06:25 AM
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nvrfgt, welcome to fte !
that 3.5l is a hoot to drive in the wife's Explorer sport, and on some of the lighter rv forums, many do use it for towing, but think you are on the right track to go to a superduty... and would suggest you go to a 350 and not "pause" at the 250 since MOST of us upgrade rv's really quickly
(look at post #2 at the top of this thread and look at the pic below a year later, HAD to get a new rv and new truck)

to the OP, I would not base my decision on mpg - at all !

Get the right tool for the job and then all the other stuff is what it is
Would you buy a crescent wrench to use as a hammer ?

If you need to tow (and carry!) 15k+ lbs, then don't get a prius ! simple as that...
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  #45  
Old 07-14-2014, 12:50 PM
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The f-350 is the best all around truck for most people. Unless you tow really heavy loads all day for work you don't need a 450 or 550 plus the gearing on the 450 or 550 is lower so you will not get the same mileage and registration fees are higher because of the weight limit on them. When you compare the f-150 to the f-350 it is worth the difference for the extra that the 350 can do and compared to that mileage you quoted I would definitely go for the diesel F-350. I have had my 2012 F-350 crew cad, lb, 4x4 Lariat for just over 2 years and I'm happier everyday I get in it. This thing hauls as*!!! If I hit the pedal getting onto the freeway I'm at 80 mph by the end of the on ramp and it is completely stock.
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2012 FORD F-350, 6.7L DIESEL, 3.73 DRW, FX4, CREW CAB, ULTIMATE LARIAT, LONG BED,
1987 FORD VAN E-150 HI TOP 210K MILES
1991 FORD F-350 SRW, C.C. LB 7.3L DIESEL 189K MILES(SOLD)
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Old 07-14-2014, 12:50 PM
 
 
 
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