Best Recorded Mpg

[joshmlinderman]

On a two hour drive going 70 mph, i was recording 19.4 from start to finish with one stop at a convenience store. Only thing after market on my truck is Magnaflow exhaust. 5.3l/4spd/3.73

 

List your best MPG and what mods you have done if any. Also list motor/tranny/gears.

 

Thanks!

[TRCM]

On a two hour drive going 70 mph, i was recording 19.4 from start to finish with one stop at a convenience store. Only thing after market on my truck is Magnaflow exhaust. 5.3l/4spd/3.73

 

List your best MPG and what mods you have done if any. Also list motor/tranny/gears.

 

Thanks!

 

 

My best was 19.6 (totally stock CC/5.3/4spd/3.73), but that trip was made @ 65 mph, was about 4 hrs of highway driving (~ 220 miles), and you have to include about 25 miles of low speed 4 wheeling, with a few WOT blasts on a dirt road to test the traction control out.

[Mulaka]

I am getting 20 pretty consistently. Bone stock.

[Stevens03]

Bone stock and 17mpg

[Mulaka]

Bone stock and 17mpg

 

 

That's pretty damn good for the 6.2! Awesome!

[gmowner4life]

On my most recent trip back to Albuqueruque, averaged about 18 going about 75 the entire way. On the way back, for the first 4 hours I averaged 24 MPG but the wind was pushing me as it was blowing pretty good. After that, it got worse for the next 1300 miles.

[cmh2001]

How do you get those kinds of numbers? I typically get 14.5mpg. The best I've seen is 18.9 but that was with a serious tail wind.

 

I have the 4.8 with automatic.

 

I have a 2'' RC levelling kit and I have removed the front valence. Someone told me that removing my valence would hurt my fuel economy. Is that true and how much do you think it affects it?

 

I am about to put on my 3'' rear lift blocks that will give me back my factory-like rake. Will that improve my mpg?

[Ryan00TJ]

My daily drive to work at the mine is around 22 miles of 45-55mph two lane roads. I average 18.5-19.4 mpg driving normally. At my old job 10 miles of 75mph interstate driving I averaged 15-16mpg. Best was a 4 hour trip @ 65mph on I68-70 to Baltimore that averaged 20.5ish unloaded. Truck in sig..

[becker87]

The best i have got on the highway is about 17.5-18 according to the DIC, this was on a calm day driving around 65. This was pure highway with no stops, stopping kills milage.

[Jeff405]

I get 16.5 all the time. Never know where the wind is blowing from here in Oklahoma, and the highways aren't too flat either.

[cmh2001]

I got 16 to 16.8 on my trip from NY to OK this weekend. I'm pretty happy with that.

[ElFrancis]

I got a question concernign fuel economy, my truck is brand new and only have 1000km on it, is it normal that it uses more fuel. I get aroung 12-13 mpg now

[wurgs]

In my work truck (05 duramax) got 29.3mpg on a one way trip of 274 miles. Tailwind was blowing about 35 mph with higher gusts and was driving 55-65 split about evenly. Next best was 19.8 mpg. Personal truck best was 19.2 with a 20 mph tailwind. Mods are Airraid intake, gibson catback and Diablo tuner.

[Zral]

Hand calc. No DIC. I have not once broken 15.3 mpg! Break'in period my ^ss. I'm at 22,300 miles and still haven't been able to pull at least 17 mpg. 89 octane, 40 mile rd/trp daily commute, 55 mph 99% of the way with a 70mph for 4 miles. That's all and this AFM is suckin eggs. I'm mad every time i pull in to fill up. Is it the 10% ethanol, do i need to run 91 octane? Maybe pull the neg cable over night, in hopes of reseting something? I kind of wish I had a diesel or at least ol blue back. it ran 20mpg on 20" chromes.

[joshmlinderman]

I think using regular old 87 will give you better mpg over 89 and definitely over E85. I don't know about 91.