GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

9.5 MPG ? something is wrong..

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Old 10-22-07, 01:17 PM
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DJ TANTRA
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Default 9.5 MPG ? something is wrong..

Hey guys,

I did a search and most people say cleaning the fuel injectors helps witth mileage..

I just realized what ****ty mileage I am getting and have a feeling something is really wrong.

EPA Fuel Economy - miles per gallon
city / highway / observed
18 / 23 / 19

Those are the average ratings for MPG.


If I fill up my tank...I can go about 190 miles...city and highway (primarily city)
this means that I am getting like 9.5mpg.
((Im calculating my MPG based on 19.8 gallon tank, but that doesnt mattter because im still only getting 180 a filling))


I put techron to clean my fuel injectors but havent noticed much improvement.

Changing gas stations hasnt helped either.. =\

Anyone have any ideas???
Old 10-22-07, 01:18 PM
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oohpapi44
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Originally Posted by DJ TANTRA
Hey guys,

I did a search and most people say cleaning the fuel injectors helps witth mileage..

I just realized what ****ty mileage I am getting and have a feeling something is really wrong.

EPA Fuel Economy - miles per gallon
city / highway / observed
18 / 23 / 19

Those are the average ratings for MPG.

lol, and that extra 600 pounds you're toting around in the trunk isn't going to help much.

Tire pressure?


If I fill up my tank...I can go about 190 miles...city and highway (primarily city)
this means that I am getting like 9.5mpg.
((Im calculating my MPG based on 19.8 gallon tank, but that doesnt mattter because im still only getting 180 a filling))


I put techron to clean my fuel injectors but havent noticed much improvement.

Changing gas stations hasnt helped either.. =\

Anyone have any ideas???
Cleaned your filters/MAF lately?

And that extra 600 pounds youre toting around in the trunk isn't going to help.

Tire pressure?
Old 10-22-07, 01:28 PM
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DASHOCKER
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Originally Posted by DJ TANTRA
Hey guys,

I did a search and most people say cleaning the fuel injectors helps witth mileage..

I just realized what ****ty mileage I am getting and have a feeling something is really wrong.

EPA Fuel Economy - miles per gallon
city / highway / observed
18 / 23 / 19

Those are the average ratings for MPG.


If I fill up my tank...I can go about 190 miles...city and highway (primarily city)
this means that I am getting like 9.5mpg.
((Im calculating my MPG based on 19.8 gallon tank, but that doesnt mattter because im still only getting 180 a filling))


I put techron to clean my fuel injectors but havent noticed much improvement.

Changing gas stations hasnt helped either.. =\

Anyone have any ideas???
You need a professional fuel injection cleaning service..... Need a place to get it done?
Old 10-22-07, 01:47 PM
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jonathancl
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Perhaps is not car -- is driver?

Try some word association:

Traffic ==
Speed ==
2.0 Liter ==


If you answered 'sucks', 'ludicrous' and 'pathetic', you may just need to adjust you're driving.
Old 10-22-07, 01:56 PM
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nytoy
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technically you can't calc the mpg by dividing by 19.8 the size of our tank, you have to divide by the number of gallons you actually put in, usually with the gas light on, it's closer to 16, which still is crappy mileage at 11.5 or so. I would suggest having the dealership to do a fuel injection cleaning service for $119.00. They hook up the BG product directly to your fuel rails and run the car a pure cleaner so it's not diluted. Good luck!
Old 10-22-07, 02:00 PM
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JeffTsai
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Sounds about right. I usually get about 150miles for a 15 gallon fill up Then again it could be my driving style lol.

As for your situation, you don't calculate based on 19.8gal. If you did use 19.8gal then you wouldn't be at the gas station, you would be on the side of the road lol. If you fill up right on the dot when that gas light comes on, then that's about 15-16 gal. If you use it until the needle goes under the line with a bit of gap between the needle and line, then that's about 18-19gal. If the gap gets a bit too big then you've reached 19.8, don't ask me how I know this
Old 10-22-07, 02:09 PM
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chinkster
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I have the same problem. full tank only gets me about 200 miles. let me know what you do DJ TANTRA. im gonna take mine to serramonte lexus and have them check out my fuel system.

Originally Posted by DJ TANTRA
Hey guys,

I did a search and most people say cleaning the fuel injectors helps witth mileage..

I just realized what ****ty mileage I am getting and have a feeling something is really wrong.

EPA Fuel Economy - miles per gallon
city / highway / observed
18 / 23 / 19

Those are the average ratings for MPG.


If I fill up my tank...I can go about 190 miles...city and highway (primarily city)
this means that I am getting like 9.5mpg.
((Im calculating my MPG based on 19.8 gallon tank, but that doesnt mattter because im still only getting 180 a filling))


I put techron to clean my fuel injectors but havent noticed much improvement.

Changing gas stations hasnt helped either.. =\

Anyone have any ideas???
Old 10-22-07, 02:18 PM
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UZ214
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i get around, 240 city/highway which kinda sucks i am at 93k miles right now
Old 10-22-07, 02:40 PM
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tommyjaix
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I just replaced my air intake filter to the k&n drop in and I noticed a big increase in mpg, I usually get 180-190miles at halfway with no cargo, but after the replacement I'm getting 210-220miles at halfway with 2 passengers and probly about 300lbs of cargo on top of that.

check ur air filter and maf and probly add some oil treatment too
Old 10-22-07, 02:42 PM
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chrispy
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I drive mostly highway and I get about 275 to a tank at mid 18 to 19 mpg. Use cruise control, try not to step on it so much. Buy some lighter shoes.

On a sidenote, I think I gained 1 mpg after installing the K&N FIPK.
Old 10-22-07, 03:33 PM
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MurdaInc
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Originally Posted by ChrisES
I drive mostly highway and I get about 275 to a tank at mid 18 to 19 mpg. Use cruise control, try not to step on it so much. Buy some lighter shoes.

On a sidenote, I think I gained 1 mpg after installing the K&N FIPK.
yea my light kicks on about 260-275...then takes about 16 gallons to fill up
Old 10-22-07, 04:16 PM
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excluesive
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tantra drives with a heavy foot.... and i love this car... nice v8 and it gets better mileage than my old (brand new) g35
Old 10-22-07, 07:36 PM
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DJ TANTRA
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Originally Posted by excluesive
tantra drives with a heavy foot.... and i love this car... nice v8 and it gets better mileage than my old (brand new) g35

you cud say that again! I drive like my foot is made of cement..but still..that bad of mileage???

Originally Posted by oohpapi44
And that extra 600 pounds youre toting around in the trunk isn't going to help.

Tire pressure?
Cliff...How did I know you were gonna say that!! lol

what tire pressure do you reccomend?? I usually keep mine on abt 34psi

Originally Posted by DASHOCKER
You need a professional fuel injection cleaning service..... Need a place to get it done?
Referral and price wud be awesome, shoot me a PM, thanks man!

Originally Posted by JeffTsai
If you use it until the needle goes under the line with a bit of gap between the needle and line, then that's about 18-19gal. If the gap gets a bit too big then you've reached 19.8, don't ask me how I know this
I usually fill up wen its close to the line! :-\ damn gas prices

[QUOTE=ChrisES;3003285]try not to step on it so much. QUOTE]

I have to...its a V8 !!! 0=)
Old 10-22-07, 07:48 PM
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chinkster
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lets just confirm that this is a GS400 we are talking about. i got a GS400 and i try to drive regular but even if i drive regular its probably only about 20 more miles for a total of 220 probably. keep in mind this is city/highway driving (mostly city). this is ridiculous! you guys that drive freeway all the time got it made!
Old 10-22-07, 08:09 PM
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excluesive
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i drive all city and i cant complain at all


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