16.2 mpg
#16
#18
I just did a 140 mile road trip today with mixed speeds but mostly highway with some heavy traffic at some spots. For the most part my speeds were 65 to 75 on the highway and got on it a few times to pass and I averaged 18.1. I have a 4.6L 3V SCREW 4x4 3.55 rear and 6.5 bed with 9300 miles on it.
#19
Well, my son has a 2006 F-150 Crew 4X4 Lariat with 3.73s and oversized 20" tires and he gets 15, so I was expecting the six-speed auto, higher (numerically) axle, and 17" tires would beat that by a little more than 3/4mpg. I would settle for 17 as my 6.0 diesel was just under that when I drove it.
#21
My 2008 F150 Super crew FX4 with 5.4 and 3.55 rear got between 13-15 but the 2010 same engine model with a 3..73 rear and the new six speed gets between 15-18. 2008 had Banks Ram Air, hypertech power programmer and cat back exhaust with magna flow muffler, 2010 just has stock intake and and magnaflow cat back exhaust. I think it may do better with the cold air intake when I add that, not sure which brand I am going to use this time. Banks was good but I don't see an application for the 2010 yet on it.
#22
#23
The first tank netted a 15.3 mpg. Each new tank increased the mileage a tenth or two. Now at 10K miles I average ~18 mph. The cool fall weather has increased mileage to ~18.7.
So I would say your mileage is about on par.
5.4 3.55 LS 4X4 Supercab (18 in tires)
So I would say your mileage is about on par.
5.4 3.55 LS 4X4 Supercab (18 in tires)
Last edited by DBPFORD; 10-10-2010 at 03:05 PM.
#25
Well trying to break in my new truck I took it on a 500 mile road trip. After filling her up with a full tank ~$80.00 all I could muscle out of her was 16.2 mpg on the highway without really pushing her hard. Does this seem about right? Truck now has around 600 miles and is getting a lot less (obviously) on street driving, got down to as low as high 9's on the street.
These new engines don't need much in the way of breaking in. However, what I just described is the way I broke my engine in, as well as getting my first oil change at 3,000.
I recently passed 18,500 miles on the truck coming back from a long trip. I averaged 20.3 MPG, this is usual for me (on the highway I mean). Like Wes28376 said, you'll get better MPG if you don't use the cruise control, at least on these 2010's.
Last edited by ncTidalWave; 10-10-2010 at 10:55 PM.
#26
once you cross about 65 say goodbye to fuel mileage. I drove my grandpas 2010 4x4 crewcab home from the dealership. set the cruise on about 62 and the read out from there to home (35mile trip) it read 19.5 mpg. Its a truck....it has been averaging 14 to 15, its the farm truck so not a lot of highway miles.