I was surpised at this tank full since we have the winter fuels around now, Im geting right at 18.5 and thats with the 20's back on the truck. I donno what gives but I like it =)

 

Glad to see the guys with the 3.73s are doing just as good as me. I wonder how 4.10s would do on the highway? City mileage already sucks but if I could get 18 on the freeway it would be my next mod.

 

I took a CO/NM/AZ/NV/UT/CO road trip in early Nov. I averaged between mid 15.n (very windy) to 21.n on the highway driving 75-80. My truck is stock except for a 2/3 drop. It has 3.73s and 18s.

Boy do these 6.2s scoot down near sea level. I am used to driving mine at my home altitudes of 6500 to 7300 feet. The difference in power is huge!

 

Maybe at home you need some kind of device that would sort of, um, "force" the air into the motor to make up for the lower atmospheric pressure.

(I live at about 300' but I know I want something like that.)

 

An altitude compensation unit...

I've used those (Vortech) at this altitude and they work quite well.

 

That's why I love the track up here since it's 200' elevation if that...

 

Damn, that’s nose bleed territory………LOL
Try 25ft!

Of course around here you still have to battle the high humidity, but on a good cool dry day its game on.

 

LOL I was a little off, it's actually 75'. Not sure where I got 200, I think that's my house..

25' is down there though, you can keep the heat and humidity though. Anything over 90 is just to warm for me LOL

 

i'm getting a 18.5 all hwy with 3.73's with 4k miles on truck. i can tell after 65 mph the gas mileage goes down.
everyday driving which is 25%hwy and 75%city it averages 15.

 

About 16 mpgs per tank.... 50/50 driving.. With the winter blend I dropped about 1.5 mpgs.