GS - 1st Gen (1993-1997) Discussion about the first generation GS300

Increasing MPG

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Old 10-20-07, 11:11 PM
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YupImJOee
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Default Increasing MPG

Are there any proven ways to increase a gs300's MPG?

I drove from Orange county to San Diego, which is about 103 miles, and it took me from the half way mark down to the quarter tank mark (im guessing its a little more than 1/4 tank). But from what i've been searching everyones gas milage seems to vary.

Im just purchased a civic intake pipe to get rid of the stock intake piping and that big plastic box resonator thing on it. From what i've read on here that plastic box resonator ruins air flow thus ruins gas mileage?
Old 10-21-07, 08:56 AM
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A.R.
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A civic intake pipe? how'd that work out?
Old 10-21-07, 11:10 AM
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Kaiser
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If your gauge is the same as mine, you have 5 gallons left out of 21 when the light comes on. That means 17/4 quarters = 4.25 gallons per quarter tank. So if you went 103 miles on 4.25 gallons you averaged over 24 mpg. That is what you should get for all highway driving. The intake pipe will not benefit you. In fact, the smaller filter on the civic intake pipe may HURT your gas mileage due to a restriction.

That little box on the intake pipe is there to reduce noise, not interfere with air flow. I've tested a few other cars on the dyno going from the stock pipe to after market and the gains were like 1 to 3 hp. It's the filter that matters. I've seen 15 hp gains for the right filter. Cut a hole in the front of the stock air box if you fear the air is being restricted. It's a common mod and should be more than enough air for a N/A GE.
Old 10-21-07, 12:31 PM
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A.R.
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So, should an a/m filter be good on a stock pipe....if u cud get that bish to fit that is.
Old 10-21-07, 12:34 PM
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Kaiser
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They make a K&N drop in for the stock box.
Old 10-21-07, 03:08 PM
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i guess 24mpg is pretty good. this is from driving those 103 miles with the top of the airbox open with a OEM filter, it just snugs itself in there and doesnt move. for the civic pipe; i read on here that a 92-95 intake pipe has the same bends, i plan on just cutting the tube to the right size up to the AFM then using a K&n drop in. since gas is up to 3.35+ for 91, im trying increase MPG in any way possible.
Old 10-21-07, 05:30 PM
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A.R.
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Originally Posted by Kaiser
They make a K&N drop in for the stock box.
really? when I went to the site it was all 2nd gen and up.
is there a first gen specific or will the 2nd gen one work?
Old 10-21-07, 06:01 PM
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Lexus Boy
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gas is high i dont even bother to look around for good low prices anymore i just fill it up till it stops usally about $50- 60 for 93
Old 10-21-07, 08:02 PM
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YupImJOee
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dude 50-60 is cheap. 35 bucks will get me half tank using 89. 91 will probably get me to about 80 bucks full tank.
Old 10-21-07, 08:50 PM
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Kaiser
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$80 from when the light goes on?
Old 10-21-07, 09:32 PM
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i dont think my light works..i never seen it go on.whenever it hits the last line i immediately go to the nearest gas station.
Old 10-23-07, 04:55 PM
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Originally Posted by A.R.
really? when I went to the site it was all 2nd gen and up.
is there a first gen specific or will the 2nd gen one work?
Autozone has them... They tried to sell me one once its like $99.
Old 10-23-07, 06:01 PM
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they;re about 48.99 over here
Old 10-24-07, 12:35 PM
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Originally Posted by YupImJOee
I'm trying increase MPG in any way possible.
Why? None of that mileage boost crap works very good. Its a big heavy car.

Buy an 4 cylinder Accord if your want a big light car that gets good gas mileage.
Old 10-24-07, 01:43 PM
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Originally Posted by bigmemory
Why? None of that mileage boost crap works very good. Its a big heavy car.

Buy an 4 cylinder Accord if your want a big light car that gets good gas mileage.
Ding ding ding exactly. It's 3800 pounds. The single best improvement I can think of is to inflate your tires to 40psi.


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