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

Horrible MPG

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Old 07-27-07, 08:15 AM
  #46  
Blavatsky
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In my 99 LS400 (same engine) I'm lucky to get 15 mpg , but I'm doing like 90% city driving. On the highway I can average between 22 and 27.
I have lightweight (~18 lbs) forged 18s, muffler delete, lexkost air intake mod.

About to try new plugs , probably torque masters, and some fuel injector cleaner to see if it helps
Old 08-07-07, 11:41 AM
  #47  
flipicanez
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My GS300 gets about 22 mph doing somewhat ruralish suburban driving, probrably averaging 40 mph. When I first bought the car, I suspect CarMax filled her up with regular octane because I only got 350 miles on the tank and it runs so much smoother on premium (I always run the tank on 'E' when I first buy a used car ot get out any dealer crap gasoline). So figuring that I went for another tank empty to get out any regular-octane-badness, I got 412 miles on the tripometer when I filled up with pure-premium-octane-goodness. Ever since I have been getting about the same 22 mph, A/C on or off.

Also for a comparison, my Honda Accord I-4 VTEC gets me about 21 mph for the same route to work and about 19 with the A/c on. I use everyday. I get better gas mileage and MUCH BETTER performance in this GS300. The Kord's aiiiite, but its a dog.

Last edited by flipicanez; 08-07-07 at 11:52 AM.
Old 08-07-07, 12:12 PM
  #48  
Joelseff
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Originally Posted by flipicanez
My GS300 gets about 22 mph doing somewhat ruralish suburban driving, probrably averaging 40 mph. When I first bought the car, I suspect CarMax filled her up with regular octane because I only got 350 miles on the tank and it runs so much smoother on premium (I always run the tank on 'E' when I first buy a used car ot get out any dealer crap gasoline). So figuring that I went for another tank empty to get out any regular-octane-badness, I got 412 miles on the tripometer when I filled up with pure-premium-octane-goodness. Ever since I have been getting about the same 22 mph, A/C on or off.

Also for a comparison, my Honda Accord I-4 VTEC gets me about 21 mph for the same route to work and about 19 with the A/c on. I use everyday. I get better gas mileage and MUCH BETTER performance in this GS300. The Kord's aiiiite, but its a dog.

Man I just read your last sentence and was like whoooaaa you drive a KORD??? Then I realize you meant the ACCORD Big Difference.
If you didn't know, a Kord is an ultra rare car from the thirties/forties, The first car IIRC with pop up headlights. It costs high six figures!!! Heehee silly me...
Old 08-07-07, 12:20 PM
  #49  
chinkster
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i drive a 400 and only get about 200-225 per tank. usually its all city driving and i mash everywhere i go. hmm maybe i'll bring it in to lexus and see what they say. i fill up once a week and it cost about $60 bucks a tank.
Old 08-07-07, 01:16 PM
  #50  
svt5150
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Originally Posted by Joelseff
Man I just read your last sentence and was like whoooaaa you drive a KORD??? Then I realize you meant the ACCORD Big Difference.
If you didn't know, a Kord is an ultra rare car from the thirties/forties, The first car IIRC with pop up headlights. It costs high six figures!!! Heehee silly me...
I have a CORD... Well, my father and I, and NO not an Accord lol. It is a 1937 810 Cord Phaeton. Yes, the prices are getting up there.
Old 08-07-07, 02:42 PM
  #51  
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Originally Posted by svt5150
I have a CORD... Well, my father and I, and NO not an Accord lol. It is a 1937 810 Cord Phaeton. Yes, the prices are getting up there.
812S engine translant? the 810 could really use another 40hp or so
Old 08-07-07, 04:25 PM
  #52  
Lexobenz
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...Also in NY, L.I. ...and my 430, only seems to be averaging 15.9-18.2 mpg according to the trip cpu in the nav... mind you I drive only 5 miles each way to work.. and it's all stop lights... if I watch the trip cpu while on the highway, I see it from 22-26+ With gas as expensive as it is & will be, I'd love to use cruise control more often.......
Old 08-07-07, 04:45 PM
  #53  
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On a recent trip from picking up my 98 GS400 from Ohio to Kansas which was almost 900 miles and I averaged 28-29 mpg. I was so suprised that I was getting that kind of milage on a V8
Old 08-07-07, 04:57 PM
  #54  
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Originally Posted by pvmike1
25 lbs. x 3 = 75 lbs. per corner, or a total of 300 lbs. Thus, rolling on Lexanis is the equivalent of having a 300 lb. passenger in your car, all the time. That'll kill your mileage for sure (not to mention acceleration, braking performance, and suspension wear).

That's why I'm a big proponent of lightweight, forged rims.
Amen to that. Thats exactly why I got rid of my cast-iron wheels and went 3 piece forged. Accerleration and pockets felt closer to having the stock wheels.
Old 08-13-07, 10:27 PM
  #55  
flipicanez
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Originally Posted by Joelseff
Man I just read your last sentence and was like whoooaaa you drive a KORD??? Then I realize you meant the ACCORD Big Difference.
If you didn't know, a Kord is an ultra rare car from the thirties/forties, The first car IIRC with pop up headlights. It costs high six figures!!! Heehee silly me...
Yeeah, Kord's a new school ricer term. I'm afraid to say I just got out of that. Sorry for the confusion . Good at least for a laugh at my past, even tho I still got it and in the process of "Unpimping The Ride"
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