if you wanted to save fuel, you should have bought another car

 

Come on man, chill out. I don't think thats the answer he was looking for. For cheap starters open up the exhaust then get some type of user tuneable EM. I would recommmend lots of brain picking from someone you know for sure who knows what there doin. Oh and look into water injection, you'll be able to lean the car out even futher to a safe limit of course. Read this thread about water injection here (all of it)-->https://www.i-club.com/forums/showth...threadid=32390

Good luck w/ your good fuel economy and power.

 

just shift at low rpm, you can great mileage if you just don't go above 3k rpm. Trust me, I did this for half a tank (yeah that's as long as I could last) and I basically doubled my mileage that I get from "spirited" city driving...

 

How many miles does your car have on it? You should get above 300 doing that... If your car is relatively new it's mileage might be a bit higher. That's not right though if it isn't new...

 

easy on the throttle
easy off the throttle
pretend theres and egg behind it...get on it too hard you break the egg...get on it just right egg stays intact

 

i wasn't trying to be mean. we all know about the fuel consumption of the car. reality check man. but really the only real way to save gas is dont push it. and if you don't push it, whats the point in having a powerful car?

 

Please don't put an aftermarket boost controller on your STi. The factory boost control does an excellent job. It's not difficult to drive your car without going into higher boost than 4 to 5 lbs. You wouldn't enjoy it very much if you needed to accelerate quickly and had to reach over and press a button to get the high boost back.

Low-compression turbo motors have a soggy bottom end compared with normally-aspirated engines. AVCS partially makes up for this but the EJ25T depends on boost to make torque.

Keep revs low when cruising but do not lug the engine to accelerate briskly. This puts an unnecessarily large load upon the engine. Driving habits have a great deal to do with the gas mileage you get out of your car.

I learned how to drive efficiently on a car without cruise control and was able to beat the EPA highway gas mileage figure cited for that car by several MPG. I did this by driving the speed limit (55 at the time) and not allowing the speed to fluctuate much, even when going up or down grades on the highway. I looked ahead in traffic and changed lanes to avoid scrubbing off speed and having to accelerate back up to speed again. City driving is a little tougher but I don't follow too closely to the car ahead of me, allowing me to coast rather than brake when traffic slows a bit. The WRX, and probably the STi, seem sensitive to even minor throttle tip-in movements in traffic, causing a significant difference in fuel consumed.

You can also ask your dealer to check out the car to see if the poor fuel economy you're experiencing indicates that something is amiss.

There are fuel-saving driving tips on the web, but mostly say what we've been saying.

--
0==WW==0
"…axles of evil…" - george w. bush

 

people get good mileage by just doing the speed limit...i guess thats why theyre really posted

 

Agreed, there is an art to getting better mileage while driving. John Phillips and Patrick Bedard of Car and Driver have written several columns detailing how they maximize economy through simple driving techniques. It's a lot like driving fast- you have to know how, and then practice it. Also, turbocharged motors have a disadvantage for getting better economy aside from boost pressure- lower compression motors are less efficient when not in boost. This means you get less energy by weight of fuel consumed for forward progress than a high compression NA motor does. IMO, the limit of what one can achieve with a WRX or STi is determined by this, and is not much higher than the EPA listings most likely. That's just the way it is. If you want good mileage, get a different car. If you want better mileage, drive slower, do less accelerating, and just plain be gentile. Patience is key.

For reference, I've achieved between 24-26 mpg highway with my RS (with occasional forays up to 29-30 mpg on long trips with few stops), depending on how aggressive I was with acceleration and how fast I chose to cruise at. I've been anywhere between 18-23 on tanks of strictly in-town driving, but that is at the mercy of many more factors than my right foot.