07 Silverado Classic C1500, lead foot. Average 15-17 MPG per tank, city and highway combined. I don't shift into OD unless I'm on the Highway. Highway only, at any speed up to 85, I see just shy of 20MPG. Towing 6-7K at or above the legal limit (I don't tow in OD) 10-11 MPG, all hand calculated. I picked up 1 MPG by switching to Mobil 1 synthetic. I refuse to figure out what my '80 gets, but it's thirsty.
Don't feel bad, I get 12 to 13 keeping it at 60MPH. If I go faster it drops to 11ish. Towing a 10,000lb trailer it is in about 9 to 10MPG. F450, 6.4L, 4.88 gears, 4WD
My 07 F250 PSD got about 13 mpg in everyday drivinng and about 17-18 mpg on the highway. Then I bought the triple dog tuner and it bumped me up about 2-3 mpg on my everyday driving, haven't had it out on a long trip with the programmer yet. My truck only has about 7300 miles on it, so I guess it's not broke in yet. Also, it depends on which station in town I fill up at on what my mileage is. I also keep my tires fully inflated at the load carrying psi even when running empty. It makes for a rougher ride but hopefully it helps on the mileage. Pulling my trailer with 4 quads (about 5K) on it I get about 10mpg in tow haul mode. What is the cut off weight for using tow haul mode? It is pretty flat around here and I only use it when I'm going up and down hills and stuff.
Some other mileage #'s, for reference: 04 Toyota Tundra limited 4x4, 4.7/ 4-speed auto: 15-16 ish all city with the pedal always buried (work truck). Surprisingly good, IMO. Usually hauling a few hundred pounds or more of stuff. 05 Chevy K2500 CC LB WT, 6.0/ 4L80e/ 4.10's: Just ran to Chicago and back in one, with about 3K worth of gangbox and tools in the back (sitting 1" or so from the bumpstops), running about 70 MPH there and back, mostly interstate but some Chicago rush hour traffic, just shy of 14 MPG. My coworkers were really surprised, they say the thing averages 10-12 MPG, heavily used work truck w/ 48K.
As I write this my truck computer is at 24.6. Hand figured it is more like 22.5. This is running here around town and some light highway driving. If I run around 65 mph then I get 21.5. As soon as I kick it up to 70 or 75 mph then the mileage drops down to 16 or 17 mpg.
I get 18.5-19.5 empty running 72. Pulling a trailer I am 10-11.5 depending on the unit. With the G56 and 3.73's the rpm's are a bit high and I may switch them out for 3.42's to see if I can get it up a bit more.
wow Since my last post in this thread almost a year ago my mileage is much better. I now have 18000 on the truck, switched to amsoil 5w30 series 3000 added Amsoil remote bypass oil filters and a nictane fuel filter. Using Howes diesel treat or Stanadyne performance formula additives for fuel since the switch ulsd fuel. My best tank was last spring @21.5mpg and I now get 20-20.5 commuting to work. even if I get a bit frisky I still get over 18.5 Motor is still stockwaytogo
Who gets the best milage? My f-250 superchipped is getting 25mpg at 70 with out a load.I haven't towed anything yet.My 79 silverado get 8-10 mpg empty,loaded ,or just at an idle.The 79 was a diesel but it blew some time back.Summit & I built this 400hp gas guzzler.Before the gas went up I might add. 2004.Thats why I bought the f-250.I do enjoy the chevy and I puled it over 400k miles with a 1982 wilderness travel trailer.At one time I was using as much oil as gas.So I reverted to the 60's,,,,dude and built a muscle car.It sounds great but it stayes in town.rotflopcorn:
No need to call BS on the f-250 mileage. I have a 00 F-250 7.3 with the 6 speed. No computer for mileage, I have hand calculated a best overall MPG of 28.something empty that was the average for a 1100 mile trip cruising between 65 and 80 MPH the whole way. of course the truck is a 2wd shortbed with the higher gears. That mileage was with the superchips tuner installed, and about 2mpg better than it was stock. Most tanks I check mileage are combined city/hwy and I regularly find 25 or better. I just wish that I could get that kinda mileage with the power of my 07 5.9 cummins Darin
my 06 ram ctd got 17mpg yesterday driving 70-75 for 246 miles. i'm running mud tires and every thing else is stock.
my 06 ram ctd got 17mpg yesterday driving 70-75 for 246 miles. i'm running mud tires and every thing else is stock.
