MPG calculations
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Originally Posted by MBBFord
I love when people say "I get 300 miles to a tank, someone says me too, some one says, yeah, I only get 200" Ask all of them what size tank they have
"I don't know"................Well if you have a 30 gallon tank, then 300 miles is 10mpg, but you have know clue so your and idiot.
"I don't know"................Well if you have a 30 gallon tank, then 300 miles is 10mpg, but you have know clue so your and idiot.
As stated before, some people have the incorrect assumption about calculating fuel economy. The way tylus and various others have stated is correct, and you have to use the amount of fuel you put into the truck, NOT the tank capacity when you calculate mileage, since you should NEVER run the tank dry.
gui88ford, thanks
More Turbo
Joined: Oct 2001
Posts: 539
Likes: 1
From: San Mateo, CA
I found out the avg mpg display max's out at 99.9 mph, but it will continue to calculate beyond what the display reads.
Coming home from skiing a couple weeks ago I reset the gauge at the top of an 8,000' summit. A few miles into the downhill, without touching the gas, the gauge read 99.9. It stayed there for another for anothere couple miles. When I finally hit an uphill/flat combo where I needed to give some gas It took almost two minutes for the display to drop. I was still above 50 mpg when I hit the valley.
By the time I got home the gauge was at 22.4 - but that was driving painfully slow, 62+/- for the 100 mile trip across the valley. Took me 20.1 gallons to fill up- saved me almost 3 gallons in a 374 mile trip. I make the trip 20+ times a season and it usually take 22.5-26 to fill up. 26 gallon fill ups usually involve lots of 4wd time.
Tim
Coming home from skiing a couple weeks ago I reset the gauge at the top of an 8,000' summit. A few miles into the downhill, without touching the gas, the gauge read 99.9. It stayed there for another for anothere couple miles. When I finally hit an uphill/flat combo where I needed to give some gas It took almost two minutes for the display to drop. I was still above 50 mpg when I hit the valley.
By the time I got home the gauge was at 22.4 - but that was driving painfully slow, 62+/- for the 100 mile trip across the valley. Took me 20.1 gallons to fill up- saved me almost 3 gallons in a 374 mile trip. I make the trip 20+ times a season and it usually take 22.5-26 to fill up. 26 gallon fill ups usually involve lots of 4wd time.
Tim
Fleet Mechanic
Joined: Aug 2006
Posts: 1,684
Likes: 0
From: Phoenix, AZ
Originally Posted by rob_nc
The best way to get a truly accurate calculation is to fill at the same pump for a month and never top off, just let the pump shut itself off.
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Oh yeah, long trips definitely net more MPG. 60 mph might have net you near 20. Of course on a real long trip 60 mph seems like forever getting there. My 4.2 standard cab 01 would do 20 mpg to Kansas City (about a 500 mile trip) average 70mph. If this 4.6 scab will come close to that I will be happy.
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