I'm getting 10 on a good day. I'm jealous.
25 Mpg
Posting Guru
Joined: Jun 2002
Posts: 1,203
Likes: 2
From: where the deer and antelo
I hope your right in your calculations. That would be great!!!
My experiance started out having me think my truck was getting around 16-18 mpg. Turns out that the valve that switches tanks was drawing fuel from both tanks, and I was only filling the one I thought I was using. I ran "out" of gas with over 3/4 tank showing. It took several hours for me to figure out that one tank was empty. A couple gallons of gas in that tank solved the problem, but my fuel economy economy went from about 17 mpg to 10.
My experiance started out having me think my truck was getting around 16-18 mpg. Turns out that the valve that switches tanks was drawing fuel from both tanks, and I was only filling the one I thought I was using. I ran "out" of gas with over 3/4 tank showing. It took several hours for me to figure out that one tank was empty. A couple gallons of gas in that tank solved the problem, but my fuel economy economy went from about 17 mpg to 10.
Posting Guru
Joined: Mar 2005
Posts: 1,004
Likes: 0
From: In the Middle
Originally Posted by brentleedragon
I am 100% positive its correct because i write my miles down everytime I fill her up
.
Laughing Gas
Joined: Sep 2006
Posts: 791
Likes: 62
From: Backwoods of western Pa
Not to Pirate a thread, but, ford141: Did you re gear axels or recalibrate your speedo after the 35s install?? If not than your getting better milage than you think. And you may be in for a fat speeding ticket because your speedo is way off.
Back to the regularly scheduled thread---
Thread Starter
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Elder User
Joined: May 2006
Posts: 947
Likes: 0
From: Spokane, Washington
25 is my highest, when i first got the truck it was 9-12 and then i got it up to about 16-18, and then 18-20 and this is my highest, I am not sure if it will be an average, I actually havnt driven the truck in a bit so hope fully it will be 20-25 which would be cool
Hotshot
Joined: Apr 2006
Posts: 11,794
Likes: 0
From: Kansas City, KS
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Senior User
Joined: Feb 2006
Posts: 183
Likes: 0
That would be great to get 25mpg, my 78 400 2bbl 4spd gets 8 to 9 mpg average per tank. I have been driving it to work while my 99 is in body shop. Now I am tired of stopping at gas station everyday to fill it up. One tank behind the axle, full of gas and guage reads either full or 3/4, but when it gets close to E i am filling up again. Also I am running 87 octane unleaded.
New User
Joined: Jan 2008
Posts: 0
Likes: 24
In the first 4 years of my truck.
Because of :
The way I drive
I had inflated the tires properly
loaded truck with minimal weight (but still had 3 pasengers)
On trip to BC, I averaged 24 mpg with my 400 C6 2.75's
This was in mountainous territory where speed always has to be altered, with many 6% & 7% grades ,drivling mainly at night.
Because of :
The way I drive
I had inflated the tires properly
loaded truck with minimal weight (but still had 3 pasengers)
On trip to BC, I averaged 24 mpg with my 400 C6 2.75's
This was in mountainous territory where speed always has to be altered, with many 6% & 7% grades ,drivling mainly at night.
Senior User
Joined: Oct 2005
Posts: 484
Likes: 0
All I have to say is wow.....and who knew that pigs could fly! I have never known or even heard of anyone getting over 20 mpg with one of these full size, emission laden, un-aerodynamic bricks. PS... please don't talk to loud, I don't want this dream to end.
Post Fiend
Joined: Mar 2005
Posts: 8,542
Likes: 5
From: Louisiana
I have gotten alittle over 20 mpg before in my 77 F-100, but that's driveing like a grandpa on the interstate at about 60-65mph, while accelerating very slowly, slowing down on over passes and the rest is flat road, and the truck as a perfect engine with alittle over 10K miles(new engine), a very smooth tranny, and 3.50 gears and 29" tires.
So basically with a perfectly tuned truck and an extreamly mpg cautious driveing style, it barley got alittle over 20 at cruseing speed.
So basically with a perfectly tuned truck and an extreamly mpg cautious driveing style, it barley got alittle over 20 at cruseing speed.