I want my mpg...

Breather mods help mpg's if you drive conservatively,

..on the other hand if you drive heavy footed because of the new power you will lose more mpg's.
 
MPG impact

The Stillen CAI was the first mod I did and it immediately increased my MPG by 1 full mpg - according to the computer. At the end of the year about when it's time to clean the filter, I notice a slight dip, but it's still better than it was the first three years I had it.

The computer puts me at 19.2 mpg. I do a lot of highway driving. 85K miles.
 
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i have a heavy foot. i love accelerating to 6000 rpm, sounds so nice but not all the time. would i end up messing up my engine like that?
 
The best I can get out of the FX35 is by hypermiling by taking advantage of the downhills and flat roads. I dialed in 25 mpg between suburban roads and highways.

In the city forget it. 16 mpg is lucky.
 
06FX35 said:
The best I can get out of the FX35 is by hypermiling by taking advantage of the downhills and flat roads. I dialed in 25 mpg between suburban roads and highways.
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I also do this, and you can increase your city mpg drastically by anticipating stops... and coast up to them. Basically, I try to brake as little as possible because every time you slow down using the brakes (whether disc brakes or engine brake or emergency brake), you are converting the energy released from combusted fuel into heat/friction on the brakes or absorbing it as load with engine braking...

If you coast for a good quarter mile coming up to a light you know is about to turn yellow then red, you may piss someone off behind you who's in a hurry, but the end result is at least +2-3 mpg city :wink: I must warn ya, sometimes it is unrealistic to do this all the time.

Oh and take off slowly and watch the auto shifting occur at ~2k :tup:

Intake will help your fuel economy slightly, as will lowering. The reduced drag and lower ride height (which plays directly into drag, again) will give you another 1 mpg or so, mainly highway when you're up to speed and drag plays a bigger role. Tire pressure, as mentioned, will also do it. Over-inflated tires are more prone to getting a flat and uneven tread wear and slightly worse traction, but is known to improve fuel economy.
 
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