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Old 05-09-2001, 11:57 PM   #1
Tim Sanderson
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00 Impreza 2.5 RS
Blue Ridge Pearl

Post any products that "will" increase mileage

Hi folks, hope I do this right,first time & all. Here is my problem: I am sick of paying 2$ a gallon, I want to improve my mileage.
Right now i'm getting 350 miles per tank.
I own a 2000 2.5 rs. your suggestions are appreciated.
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Old 05-10-2001, 12:02 AM   #2
Rexy
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Dura-lube man...(this guy I work with Swears they gave him 4 extra MPG).....hmmmm not sure.
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Old 05-10-2001, 12:02 AM   #3
XT6Wagon
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Um, fresh plugs and wires?

Turbochargers runing mild boost (4psi or so)always help if tuned and driven right.

My SHO picked up 2mpg highway with a CAI, so you might see the same on the RS.

Put in an extra 5psi in all 4 tires.

clean out all the extra crap in the car.

etc,
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Old 05-10-2001, 12:03 AM   #4
SuBaRu-ImPrEzA_RS
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some other guys will probably reply saying they get 400 a tank..id like to know how,

i have a 2000 RS and i can get 360 to a tank (thats pushing it) with the low fuel light on...

if you have a leadfoot, mileage will only decrease..

~~PeAcE~~ John www.impreza25RS.cjb.net
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Old 05-10-2001, 12:04 AM   #5
ChosenWon
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If your getting 350 in an RS your already doing pretty damn good. But here goes:

Mobil1 I went from 260 a tank to 360!!!

Plugs (NGK)/ wires (bosche)

Airfilter (K&N or AMSoil)

Cold Air Intake (best bang for the $? Ganzflow. I think you get a bargain deal if you buy the ganzflow and either of the above mentioned filters together. you save on shipping regardless.)

Watch your tire inflation, ahd try to lay off the AC.
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Old 05-10-2001, 12:08 AM   #6
ChosenWon
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Wow, 4 posts in 7 minutes?! I was working on my reply and I thought I was going to be the 1st to reply!

But anyway, I got your duralube right here:

DuraLube dealt a crippling blow.

The manufacturers of the DuraLube engine additive have also been dealt a smack in the face by a Car & Driver Magazine report into their product. C&D tried the same tests as Consumer Reports did on ProLong, and had similar results, but in a much quicker time. The C&D engines lasted a staggering 11 seconds without oil. You do the math. The Federal Commission has been handed the details and are 'processing' it.
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Old 05-10-2001, 12:10 AM   #7
SuBaRu-ImPrEzA_RS
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tell me about it Chosen, i thought for sure i'd be the first to reply..

~~PeAcE~~ John www.impreza25RS.cjb.net

[This message has been edited by SuBaRu-ImPrEzA_RS (edited May 10, 2001).]
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Old 05-10-2001, 12:17 AM   #8
ChosenWon
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I am so ashamed SuBaRu-ImPrEzA_RS...
...We let a newbie beat us to it!

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Old 05-10-2001, 12:30 AM   #9
Adrian128
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Actually.. I always thought that driving style/attitude contributed more to the either low/high mileage achieved than any additive. Just my thoughts.
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Old 05-10-2001, 01:04 AM   #10
ImprezaRS dot com
over boosted again
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Driving style is responsible for most of the improvements you get.

However, I did see a 2-3mpg improvement in highway mileage in my RS with GanzFlow CAI, but only AFTER training the ECU for several weeks. After an ECU reset, the gas mileage drops 10-20% in the city for a few weeks, but the highway mileage increased IMMEDIATELY. I was getting 28-32mpg on trips to Denver after the CAI, but city mileage after an ECU reset would drop to 18-21mpg since I was hard on the gas in the city alot to train the ECU and enjoy the extra power. After training I'd get an average of 23-24 mpg mixed driving.

Larry www.ImprezaRS.com

PS: With turbo now, I get about 15-20 city and 22-30 highway. Depends on how hard I drive and how much boost
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Old 05-10-2001, 01:19 AM   #11
Kostamojen
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Hmm, lets see...

Nope, just go buy a honda insight! J/k
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Old 05-10-2001, 02:50 AM   #12
Retsyn
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Just to chime in here. I've gotten really good mileage too by basically doing the same thing chosenwon did. Ganzflow, Amsoil and the Magnecor wires and NGK plugs are on the way. It really makes a big difference!
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Old 05-10-2001, 04:09 AM   #13
tmat3
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1) Change your driving style. No lead foot or frequent stop and go.
2) Cleaner plugs, wires, and filters
3) Make the car lighter somehow.
4) Use major brand gas, not gas from some unknown company.
5) Instead of A/C, open windows if it's cool enough.

I get about 350 miles per tank.
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Old 05-10-2001, 04:18 AM   #14
makua11b
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Anything you can do to free up the breathing of your car will give quit good results; i.e. cat.con. removal or replace with high flow versions and less restrictive intake.
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Old 05-10-2001, 04:51 AM   #15
Revision
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Shift at 6, 18, 25, 35mph (on flat level surfaces only). Keep the revs low. Avoid resetting your ECU. Don't refill the tank, drive until you are almost empty. Remove all un-nesscessary weight from the car.

Typically my average milage with lots of mixed highway is 25 mpg. Once I even got 28. <-- I still want to know how I did that one.
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Old 05-10-2001, 05:25 AM   #16
ins8ibl
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well I just got 30+ mpg (although I do have a 1.8L). I usually get much lower but I have changed two things recently, my driving style, these motors are ineffient near redline, and I have been driving *slowly* on highways. The impreza does not have a very low Cd, so going 65-80 on the highway sucks up a lot of gas, at least in my car.
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Old 05-10-2001, 05:32 AM   #17
Snoopy
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I got some better mileage once I had the Unorthodox Underpulley installed. Less crank power to the A/C and alternator and more towards teh drive train! I had no idea that would happen. I regularly get 345 total miles with spirited driving, up to 360 on hwy and early shifting(never over 3k rpm).
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Old 05-10-2001, 05:49 AM   #18
Crash and Learn
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How much mileage are you looking to get? I get anywhere from 350 - 360 mpg regularly. I haven't changed the plugs or wires. I use 87 octane all the time and do anywhere from 75-80 on the highway. I once did over 400 but I really topped off the tank and was driving a bit slower but like I said that only happened once. 350-360 is plenty good. Unless of course you're driving 100 miles a day or something or you're gassing up more than once a week.
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Old 05-10-2001, 08:41 AM   #19
Tim Sanderson
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Alright,some good ideas. I figured the solution was increased breathing. Thank you people. Bye the way, has anyone tried A hotter ignition?, I know the one co. advertises increased mileage & power. Would A cat-back/headers help? Perhaps a lighter body kit?
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Old 05-10-2001, 09:00 AM   #20
Tim Sanderson
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Join Date: May 2001
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Location: S.E. wisconsin
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00 Impreza 2.5 RS
Blue Ridge Pearl

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Has the iridium plug craze faded? Are they worth the money? Do they help? so the list is:
1: cold air intake
2: new plugs/magnecor wire set
3: underdrive pulley
4: shift @ 3ooo rpm/don't lead foot
5: good lube/good gas
6: headers/cat back
This has the makings of an install party.I like this club.Keep the ideas coming.Thanks
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Old 05-10-2001, 09:06 AM   #21
Snoopy
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Gas prices....it's definitely gonna change my driving habits. 3000 rpm shifting all week so far. I think I'm gonna get about 370 miles on this tank.

For the big SUV, I have no sympathy. Eat it.
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Old 05-10-2001, 09:10 AM   #22
brandon
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If you're looking for highway mileage, the absolute best bang for the buck is to take off the spoiler and hood scoop. Less drag, better mileage.
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Old 05-10-2001, 09:17 AM   #23
ChimChim
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I usually only get about 280mpg in my MY01!
DOH!
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Old 05-10-2001, 09:34 AM   #24
svxtrem
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Actually the mods to increase breathing are beneficial for WOT horsepower, but not for part throttle gas mileage. At part throttle, you are limiting the amount of air that can go into the engine. This results in 'pumping loss'. This is the energy required by the engine to produce a vacuum in the cylinder. To increase mileage, and part throttle torque you actually want to introduce as much backpressure as possible into the exhaust system. Of course, this will have the downside of limiting your WOT horsepower. Anything related to reducing friction will also help- increase tire pressure, synthetic oils, etc.
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Old 05-10-2001, 09:45 AM   #25
8Complex

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Hmmmmmmmm... around town, I usually get around 225/tank (14 gal. worth - about 17-18mpg). On the highway my absolute best is 28mpg (350-375/tank), but that was cruising at 75mph for hours on end.

I tell you... I'm going to be HAPPY to get the turbo kit on the car and tune it right.
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