How to boost gas mileage? - Subaru WRX Forum
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post #1 of 5 Old 01-28-2008, 09:58 AM Thread Starter
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Exclamation How to boost gas mileage?

Hey guys
I wondering if anyone seen decent increases in gas mileage from cheaper mods. I am very aware of user controls for increasing Mpg (low to no boost) but I'm not aware of any mods that can increase mpg. The reason I ask is that I drive a good amount miles (50-150 per day) of rural twistie backroads to, from, and for work everyday and its torture not to show the local rednecks how a Wrex should be driven. If I Light foot it, I can get 23-24 Mpg. I am running a stock 04 wagon on Premium only gas.
THanks for any help!
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post #2 of 5 Old 01-28-2008, 10:59 AM
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A good tune will get you better gas mileage. Plus COBB had economy off the shelf maps for their accessport. Other things like freeing up restrictions in the intake/exhaust on top of that tune will not only add performance, but good gas mileage as well.

DTRacing Tuned
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post #3 of 5 Old 01-28-2008, 11:17 AM
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premium gas is not entirely necessary unless you runn higher boost or drive in hotter conditions. you could go with mid grade gas as far as the overall cost of fuel is concerned

probably the best thing you can do for highway speed fuel economy is go with a more open exhaust (after the downpipe) the turbo will work more efficiently, and you wont be into the turbo as much to get going if the exhaust can breathe easier.

driving habit will play a major role as well. drive at a lower average speed, or ease into a higher cruising speed.

if you see a red light coming, time it o that you slow down enough but have not stopped by the time it turns green, things lime that.

inflate the tires to within 10 % of the max peressure, for example, a 44 psi tire should be aired to 39.6, or a 35 psi tire at 31.5 (essentially 32psi)
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post #4 of 5 Old 01-28-2008, 05:49 PM
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only advice i got is too get a good tune and stay out of the boost
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post #5 of 5 Old 01-29-2008, 06:00 PM
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The Cobb economy map isnt worth a thing. I got just as good MPG on the stage 1 map as the economy, plus the stage 1 still had power. But if you replace the DP you should get better flow, more power, and if driven properly better MPG.

"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX"
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