mhahnjr

I thought about getting the throttle spacer. I know it will help. The one you place behind the gas pedal. This makes sure you con't use too much gas!

blowngt

Since you took my comment in stride I will help you out...lol CrazyAl gave you the best advice. Have the car conservative tuned, specifically tweak down the VCT and add some lower gears. Granted the lower gears won't give you another 20 mpg, but keeping the car in low rpm in highway driving will make the best impact without downgrading your power. You will give up the seat of your pants take-offs with the gears, but you will keep your top end and run at lower rpms in cruising speeds.

CrazyAl

You've definatley got the right idea. However, the problem is that modern engines are already very efficient from the factory. All the major auto makers are working very, very, hard to get their mileage and smog numbers as good as possible. There was a lot of room to improve efficiency on old motors, but with modern computerized design and testing, there isn't as much room to work.

As we discussed earlier, an air intake and headers can improve efficiency. But, it's not a certainty. First off, it's not a huge amount. Second, it's easy to get a bit heavy on the pedal, in which case you won't see any benefit from the change. (That's why I said earlier that you have to have good pedal discipline)

You also have to consider the cost of the mods. For example, if you buy a longtube header kit ($1000+) and then you have a shop install it, you could easily be spending $1500-2000. That will pay for a LOT of fuel, especially when you figure that you'll only be getting a 5% or so improvement in mileage, if that. It would take years to recoup the cost, if at all.

Weight savings, including drivetrain components, will help in situations where you have to accelerate a lot (stop-and-go city driving). They won't do squat for highway mileage. Don't forget to factor in the cost of the mod as well.

Honestly, I think that most gas-mileage mods aren't going to pay off unless you can get them really cheap and you're willing to recoup the benefit over the long term.

I would stick with the inexpensive (or free) basics: Keep your oil changed regularly. Keep the car clean, don't carry any extraneous cargo, and make sure you check your tire pressure frequently. Make sure your air filter is cleaned/replaced frequently.

Tracedaddy

I gained 10% on my fuel economy (20 vs 22 mpg) after I installed my CAI and 93 performance tune. Of course, the switch to premium fuel used up a majority of the savings, but I do have significantly better performance and throttle response now.

blackout

Your best bet is to swap out your current v8 and convert your stang into a hybrid.

[sm=joke.gif]

IMO there is nothing that is going to significantly get you better gas mileage.

torch red

Also Tire pressure is key..the harder the tire (pressure wise) less rolling resistance..

Keep Tire pressure at the Max Amount according to your tire...

*~*~Mustang Kari~*~*

bodyputtyless

A hunk of used 2x4 placed strategically under the gas pedal will increase mileage.

Goldenpony

GEARS.

MikeVistaBlue06

A BIG block of wood under the go pedal!

I got 24mpg with mine stock (automatic with 3.31 gears) doing 80 on I-20 from Dallas to GA. Not too bad.

Mike