Quote:
Originally Posted by Dave10
I got 12.3mpg with a 2012 Ford F350 SRW pulling a sOB 40 ft 16200 GVW 5th wheel. That was the average for going from California to Connecticut. I set the cruise control to 60mph and enjoy the scenery. I suspect the new Fords get less mph because they increased the torque and hp. That possibly true for the newer Cummings as well. HP and torque require fuel to achieve that power if required. Also, friction increases by square of the speed, so driving faster and head winds see an exponential increase in friction.
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Quote:
Originally Posted by mlh
I know these are Diesel engines but I checked some very good scientific testing that was done on the 3.5 Ecoboost engine. I would suspect a diesel isn’t much different. Gas mileage went down 20% from 60 MPH to 70. Then add in wind a head wind or tail wind differences in the road grade and driving habits different in temperatures it’s no wonder these figures are all the place.
I would bet any of the trucks driven the same place same day same speed, same every thing there would be no verifiable difference in the fuel mileage. They all have about the same size engine same manufacturer for the fuel injection system same compression ratio, again almost the same everything.
How could there be any verifiable difference in fuel mileage?
Lynwood
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2017 F350 SRW pulling 3731FL from GA to NY 1000 mi. hooked up all the way 11.8mpg over 4 days. I set the cruise at 67. Comparing to Dave set at 60 seems about right. Highway speed do make a difference IMHO
IN my 2010 F350 with the 6.4 I would get 8-9 in that same trip.