Big Jimbo

Last week I was driving from Tucson to Phoenix and decided to see what effect speed had on the fuel mileage. My 2004.5 has about 5,500 miles on it and I haven't towed with it yet so it may not be fully broken-in. I have had the flash update and there were two people in the truck with a Leer topper. Since I have had the flash update my overhead is dead on with my hand calculations so this should be fairly accurate. I set the cruise control for each speed and went for exactly 10 miles at that speed before reading the MPG. The temp was 70 degrees and the road is very flat.

60 MPH = 22.8 MPG
65 MPH = 22.0 MPG
70 MPH = 20.0 MPG
75 MPH = 19.0 MPG
80 MPH = 16.8 MPG

BigBlue

At 75 on my truck I get 13. At 70 I get 16. This is with 4.5" lift and 35's. Anything below 70 will get you killed down here.

bhoeffner

Drove 1200 miles over the holiday weekend at 75 MPH hand calculated 20.5MPG. Had volumizer set on 50 HP setting.

FastZilla

Spin that CTD over 2k rpm and the fuel economy goes down the crapper.... I say 6.5" lifts and 37" tires on 3.73s - unless you're towing all the time - then you suffer.

FastZilla

Gotta be driving it like you stole it to get 13mpg... I averaged 85 mph for 350 miles - filled up and was getting 14.2.

Side bar:

I fully condone the "drive it like you stole it" technique. Up here you have to blend that with the "drive it like it's a `76 LTD beater" technique with mild use of the "I don't give a flip" and the "I'm uninsured and don't care" techniques. I have yet to adopt the "I didn't make eye contact so I can cut you off" technique or the "Drift into you lane to make you slow down so I can get in front of you" technique.

Almost took a lady's mirror off yesterday with the snow plow, she was 2ft into my lane, plow blade at driver window with Western flag on blade guide flappin all over the place....

falcondan9570

"Drive it Like You Stole it?"... Does this mean drive carefully so as not to get pulled over by the cops?.. Or, does it mean to drive it like you don't care if you "grenade" it??? Spin the tires, hit other cars, poles, curbs???. Shoot, if it weren't mine, I wouldn't care...All our trucks are is just a "bunch of nuts and bolts".. There is a limit on what anything can take...

Dodgezilla

I believe it refers to the second scenario.........

FastZilla

Kind of like what you see on "Cops" or "Crazyest Police Chaces"...