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Bad GS400 Gas Mileage

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Old 09-16-14, 09:15 AM
  #16  
FrankT
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Originally Posted by islexusred
Impossible!!! Not calling you a liar but thats hard to believe...
i get 240 per tank 60% freeway and A/C on about 80% of the time. also where do you live? am from UTAH
In my 1998 GS400; when I'm at 200 miles, my fuel gauge reads exactly 1/2... A/C on 100% of the time. I fill up at 360-370 miles, about 15 gallons. Doing the math; thats about 24mpg.
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Old 09-16-14, 10:32 AM
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Here in Vegas. Most roads are open. I have gotten 400 miles all freeway. But I don't stomp my pedal all the time. I get out accelerated all the time.
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Old 09-16-14, 11:57 AM
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islexusred
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Originally Posted by FrankT
In my 1998 GS400; when I'm at 200 miles, my fuel gauge reads exactly 1/2... A/C on 100% of the time. I fill up at 360-370 miles, about 15 gallons. Doing the math; thats about 24mpg.
Wow you get 10 miles per gallon more than me. I get 14mpg on good days...what mods do you have on your Gs, also what is your driving habit like?
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Old 09-16-14, 01:19 PM
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anyone else here drive with their power button on 100% percent of the time? I'm all stock and i get about 14.1 mpg
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Old 09-16-14, 03:32 PM
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I get less than 15 mpg also glad it's not my daily.
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Old 09-16-14, 03:37 PM
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maxx430
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i get about 18 mpg mix city/highway driving. 2001 gs430.
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Old 09-16-14, 03:42 PM
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htt760
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Thats not bad. My new Chrysler gets 14 mpg if I am a good driver that day :-)
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Old 09-17-14, 04:57 AM
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I live in Honolulu , I only get 11mpg .
90% traffic jams city driving
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Old 09-17-14, 07:27 PM
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99GS400HP
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200 half tank is not impossible.. i get it all the time.. i never use AC though.
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Old 09-18-14, 01:55 PM
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FrankT
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Originally Posted by islexusred
Wow you get 10 miles per gallon more than me. I get 14mpg on good days...what mods do you have on your Gs, also what is your driving habit like?
No engine mods...
I drive like GRANDPAw,(that's what my grandson calls me) at or near the speed limit.
I also use a Ultagauge.
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Old 09-21-14, 01:04 PM
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czr73
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Pure craziness gentlemen, my 04 GS300 get 365 miles per full tank of premium mid-grade NON-methenol gas. I'm in North Jersey too !
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Old 10-01-14, 05:35 PM
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Guess I shouldn't complain about 300 miles per tankful in my GS400.
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Old 10-01-14, 07:58 PM
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Originally Posted by tlts82
Has any of you guys had a issue with the fuel gauge? Once I ran out of gas at about 1/4 tank left. So basically for the last year I've been filling up before if hits the 1/4 mark.
faulty jet pump
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Old 10-02-14, 06:19 AM
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240~260/Tank. No Engine or exhaust mods with 58k mi on the 1UZFE.

Originally Posted by GSTim
Make sure that the right fuel pump is in the vehicle.

I have a 98 gs400. I get about 200 at the half mark.
Would this actually improve mpg?
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Old 10-02-14, 05:36 PM
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Originally Posted by czr73
Pure craziness gentlemen, my 04 GS300 get 365 miles per full tank of premium mid-grade NON-methenol gas. I'm in North Jersey too !
what is premium mid-grade...
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