05 chevy 2500 diesel mpg

[Diamondpilot]

I have a 2006 Ford F-350 PSD Extended Cab 4x4 with single rear wheels and 3.73 gears. When I bought the truck it got 17mpg. At 5000 miles I changed the oil, put on 4" exhaust with a new turbo pipe, installed a MAC intake and air filter, and lastly a Quadzilla 120HP chip. After these mods I got 23.7 mpg on the highway. I only drive the truck at 1900 rpm which gives me 78 mph. I now get about 17 mpg average if I can keep out of the throttle. I use this truck to tow 50% of the time and 90% of my driving is in stop and go traffic with only 10% on the highway. I took the truck to the scales and it weighs 7,600# with me in it and 3/4 tank of fuel. I have also taken it to the drag strip and it ran 14.1 at 98mph in the quarter. I had to used 4 wheel high for the first 1/8th mile to keep the wheel spin down.

The trick is just keeping out of the throttle. My neighbor has a bone stock 2007 classic 3500 4x4 Chevy crew cab with long bet. He can do 20-21 mpg on the highway by driving it sensibly.

Chris

 

[ronjhall]

John
Thread is Seen this yet II. "Seen this yet" was start of the subject. But it was closed because of who did the paper.

 

[gemini5362]

If you want better mpg's, drop your mph's. It's just that simple. Also, drive like a grey haired granny from the stops, plan your trips, do as much as you can to keep the truck temps up. A hot truck runs less fuel than a cold truck. A LOT less fuel.

I would say that if you want 20 mpg, drive on the freeway at 60.0 mph. You will get it.

jb

John you can get that with the 6 speed allison if you do all the above you mentioned. And keep below 70. If I drive 70mph and take it easy on start and stops I can see 20mpg