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

MPG on an aristo? Who elese has horrible milage.

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Old 06-16-07, 06:19 PM
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zazzn
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Originally Posted by 4doorvip
I just got 300kms out of my last tank.. yikes!
I have gotten tanks as bad as 300 my self but thats very heavy right foot for sure.

400 is with OUT ac!!! the car can't be THAT bad on gas come on! i don't believe it...

I mean it's not a friggen v10!

I don't think aristos have 2 cats... Just one.

I'll putll it all off add a air filter, change the plugs, and see how she does but I don't think it's goign to be that much better the car runs fine.... I didn't think the car would guzzle so much gas... I guess i'll have to get that emanage on there sooner then later to get leaner burns.

damn I'd expect 500 at least on a 79L tank or what ever it is...
Old 06-17-07, 12:14 AM
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christodav
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Originally Posted by zazzn
I don't think aristos have 2 cats... Just one.


Nup....they have 2.


Chris
Old 06-17-07, 12:32 AM
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4doorvip
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yah 2 cats
im thinking mine might be clogged? whats the best way to clean them? get new ones?
Old 06-17-07, 12:32 AM
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4doorvip
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and yes I get about 300km a tank. and my foot is very heavy
Old 06-17-07, 02:37 PM
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vhp
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hi guys,
where can I buy my O2 sensor ?
Thanks
Old 06-19-07, 06:15 PM
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zazzn
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napa, lexus? try there yet?


Hrm i donno the power is good I've felt clogged cats... and I just passed the e test with flying colours.. well regardless we'll see when i put full exhaust on.
Old 06-19-07, 09:52 PM
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4doorvip
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sounds good keep us posted. I would like to see you fix this as I am in the same boat
Old 06-23-07, 10:48 PM
  #23  
V300Graham
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I have a original 1993 TT Aristo,
and have bought and installed a brand new
O2 sensor recently.

The bad news is that,
it made little difference to the cars
power or economy.

I range between 18-22 mpg,
or more if using more of the engines potential...

I have 125,000 miles showing on mine, BTW.

Last edited by V300Graham; 06-24-07 at 01:55 AM.
Old 06-27-07, 01:04 PM
  #24  
DBaristo
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OK there is a massive difference between 16 mpg stock and 20-22 mpg modified. There is definitely a problem somewhere as my stock TT averaged about 20 mpg and my t61 small single returns about the same if not better on longer trips.

It does though depend heavily on how much and how far you push that right foot down. My supe with 450 ish on BPU+++ mods caned fuel if you went for it. On a track day I dropped down to about 5 mpg. If you best the *** off your car everywhere you go then it won't be surprising to see 16 mpg. Also there are a lot of V10's about on the american market that won't even match the aristo's bhp.
Old 06-27-07, 01:11 PM
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4doorvip
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I'm getting about 400-450kmh a tank now.... maybe the ecu had to adjust???
Old 06-27-07, 01:12 PM
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4doorvip
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*also I have installed a new K&N air filter, my old "Kool Blue" one was filthy
Old 06-27-07, 04:48 PM
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zazzn
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I think it has more to do with the air filter, mine is really really bad too, I'm kinda hoping thats what's causing the really bad milage, actually i'm praying thats all it was.

But I have a whole slew of things to change anyways to try to get some more milage out of it.

Hoping that with a little help of the emanage leaning out everything especially underboost. I was really hoping that the 2nd gen 5 spd trans would help things out as one extra gear really helps for city driving. Maybe I'll do a 5 spd swap but i'm a little leary of punching holes though the firewall for the clutch peddel.

As I did say ealier, I had a sticking caliper so I'd imagin that wasn't helping at all with my problem.
Old 06-27-07, 08:42 PM
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I should clarify 'heavy'.

The ecu starts to wander from stoich to rich before 1/2 throttle-ish (as per wb02).

My advice would be to try a tank of "mostly" not going past even a 1/3 throttle and see how it goes. If you still get bad gas mileage, then consider the o2 sensor.

If you buy a new o2 sensor and still drive lots over 1/3-1/2 throttle. Expect similar bad gas mileage.
Old 06-29-07, 07:04 AM
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zazzn
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i know it's something other then my foot i barely got over 400 on highway driving at 100KM
Old 07-01-07, 12:21 PM
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Default o2

I posted in here earlier about my crap *** mileage, I just grabbed a used o2 off of supraforums as per kaiser's suggestion, I'll let you know when it arrives (and I get it installed).


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