do it for science :)

[Mustang Dave]

Average before I found ecomodder.com (vehicle less than 2 years old with <15K miles) - 28.021 MPG. Had ONE fill-up at .02 MPG under EPA highway estimate. (and I had to work at that one)

Average since I found ecomodder.com - 30.266 MPG.

About 8% gain.

Engine, drive-train, and tire break-in likely accounted for some of the gain.

[ecomodded]

With my beetle I gained 9-10 mpg from a combination of technique , my fuel pump tuning box and 50 psi in the tires.

My mpg was constantly at 51-52 mpg until i made those changes now i constantly get 60-61 mpg

[Weather Spotter]

I could let my bother and soon to be sister drive my car for a tank.... He is a cop and drives like the speed limit is a good minimum speed for icy days he also thinks the gas should be on the floor or the break on the floor but not much middle ground

he would get about 30-35 MPG from my car.

[MisterInnovation]

I think you underestimate what the nut behind the wheel can do to your fuel efficiency.

[niky]

I think you may find that when driven hard enough, a car will eventually get to the 0 gallons per mile mark.

Of course, the steaming, overheating pile of slagged metal will be doing 0 miles at that point...

A mote pressing question would be how much gas people waste sitting at stoplights or in gridlock without turning the engine off...

[Joeggernaut]

What a lot of people don't also take in account when driving like an a$$hole or racing to stop lights is the extra wear and tear on the drive components. People are not only using more fuel but they are cycling the engine through rigorous rpms speeds, hard on the suspension, and hard on the brakes. This costs more than just a few pennies saved from driving efficiently.

[Old Mechanic]

Originally Posted by niky

I think you may find that when driven hard enough, a car will eventually get to the 0 gallons per mile mark.

Of course, the steaming, overheating pile of slagged metal will be doing 0 miles at that point...

A mote pressing question would be how much gas people waste sitting at stoplights or in gridlock without turning the engine off...

Idling is responsible for 13% of the total fuel consumption in the US.

regards
Mech

[Old Mechanic]

One time long before I became obsessed with mileage, my 1976 280Z lost the alternator belt about 10 miles from the shop on a parts run. The belt was OE but broke right at the seam (only one that ever did that to me). I used pulse and glide and bump starting, engine off coasting. The clutch fan kept the water pump spinning and when I got to the shop the engine was actually cooler than it would have been if I had driven normally. I saw the same scenario in the Florida Keys at the Benz dealership where I worked. A man came in an a Jaguar with a broken Alt-H20 pump belt. He did not like our price quote and drove away with the broken belt.

regards
Mech

[kennybobby]

Instead of a boring commute, driving has become fun again--trying to look ahead for traffic lights, maximizing coasting, all the techniques, etc. Gives me something fun to do and the improvements in FE are great motivation to see just how good you can be. Starting to be such a habit that the old way of driving is difficult.

[Fat Charlie]

Average before finding Ecomodder: 21-22 mpg. Best tank 25 mpg.
Average since finding Ecomodder: 30.91 mpg. Best tank 34.77 mpg.
Same car.

No way I'm going to A-B-A that. Plus, as kennybobby points out, the commute is a lot more fun.