Your best modification

[gasti_ako]

thanks for all your replies. I am now planning with the tires and wheels: 14" or 15", 45 PSI that are low resistant rolling. Next would be a grill block off.

would carbon fiber parts offer significant decrease?

[gasti_ako]

Originally Posted by MazdaMatt

I can't afford a new driver.

how do you know if the driver is a good hypermiller? I have a friend who says he is a fuel efficient driver but I think its bull. I notice the way he drives and i think I am still better. He says that he is getting good fuel mileage out of its car but he can't even show me a fuel log. Basically he assumes his MPG.

And if ever he is correct about the MPG, i think its not the driver but the CAR!

[azraelswrd]

Scangauge for me

[Will]

Tires, so far. I am still really working on the nut behind the wheel. It's hard breaking years of habits...

[Big Dave]

Most significant changes (beyond adjusting the nut behind the wheel):

Replaced 3.73:1 gears with 3.08:1 gears +3 MPG

Fastback bed cover +3 MPG (over open bed)

[Who]

Originally Posted by RH77

Engine Block Heater

Mine worked out to saving about a nickel a day (gas savings vs 2 hours with 400 watts) on a nearly $400 investment.

[Frank Lee]

Your heater cost $400?

[Who]

Frank, the heater costs about $40 with all of its excess markup. It's the labor for the install at the stealer, a frame cross member has to be removed. I wish it was done at the factory. It would cost 2 to 10 bucks there total. Add the timer and a winter type extension cord and it's not a cheap investment.

Regardless of the cost, it helps on the first trip of the day and it saved about 5 cents a day during the non-summer months.

[aerohead]

Boattails

[93Cobra#2771]

Besides fixing the driver, I'd say

50% Underdrive pulley
Luggage rack removed
+5 psi

Air dam and some seam sealing on it's way.