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

Can The GS run on Regular unleaded gas?...

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Old 09-17-08, 10:16 PM
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LiLS
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Default Can The GS run on Regular unleaded gas?...

since ike alot of gas stations stop sellin premium, only unleaded
Old 09-17-08, 10:32 PM
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AYEmike
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Originally Posted by LiLS
since ike alot of gas stations stop sellin premium, only unleaded
isn't engines for lexus designed to work efficiently with premium?
loading your car up with unleaded will probably bog up the engine.
Old 09-17-08, 10:41 PM
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All pump gas is unleaded, i believe you meant, regular, i which case it is perfectly fine, this has been discuessed before on here

The one or two times i had to fill up with regular (87 octane) i didnt notice any performance loss, but my MPG dropped from 23 to about 18.5 or so
Old 09-17-08, 11:19 PM
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chrispy
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There's a lot of people asking this on forums since the hurricane happened. It should be fine, your car will just not perform well and the MPG will go down.
Old 09-17-08, 11:49 PM
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SH_JZZ30
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My parents put 89 octane (mid grade) on our 2000 GS300 and the check engine light came on and the car started bogging. The vsc light came on as well.

I checked the codes and it said misfire on 3 cylinders.

I put in an octane booster and put in 93 (premium) and it never came back on.

Last edited by SH_JZZ30; 09-18-08 at 12:06 AM.
Old 09-18-08, 03:12 AM
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Seize
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https://www.clublexus.com/forums/sho...ghlight=gas%2A
Old 09-18-08, 05:08 AM
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Yeah some gas stations only sell regular due to the hurricane. I had to drive around to a few different ones to find one that would sell premium. I got tired of searching today so I just filled up with E85 for $3.10/gal today. Seems like most people don't bother with this corn fuel so it's usually available. I had a little TOO much fun on corn fuel due to it being 106octane straight from the pump. 30psi + going sideways 1st & 2nd + spinning 295wide tires thru 3rd gear = fun!
Old 09-18-08, 05:50 AM
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sojah
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wait a second here... you mean to tell me that e85 is actually 106 octane?? and its cheaper than regular or premium?? what are the negatives to just switching to e85??
Old 09-18-08, 06:28 AM
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Originally Posted by sojah
wait a second here... you mean to tell me that e85 is actually 106 octane?? and its cheaper than regular or premium?? what are the negatives to just switching to e85??
i think tuning. upgrading fuel lines and others..dont know off hand..jeffstai does.
Old 09-18-08, 07:26 AM
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samramos
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regular's fine. i've never pumped with anything else, and not a single problem 150,000 miles in
Old 09-18-08, 08:15 AM
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jcat_350
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Originally Posted by JeffTsai
Yeah some gas stations only sell regular due to the hurricane. I had to drive around to a few different ones to find one that would sell premium. I got tired of searching today so I just filled up with E85 for $3.10/gal today. Seems like most people don't bother with this corn fuel so it's usually available. I had a little TOO much fun on corn fuel due to it being 106octane straight from the pump. 30psi + going sideways 1st & 2nd + spinning 295wide tires thru 3rd gear = fun!
Jeff, I love you and hate you all at the same time. Haha i wish there was E85 readily available around me, i'd probably do the conversion as well.
Old 09-18-08, 08:43 AM
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Originally Posted by jcat_GS3
Jeff, I love you and hate you all at the same time. Haha i wish there was E85 readily available around me, i'd probably do the conversion as well.
I totally agree, and i would do it in a heartbeat
Old 09-18-08, 09:25 AM
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ISFjimmy
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Originally Posted by JeffTsai
I had a little TOO much fun on corn fuel due to it being 106octane straight from the pump. 30psi + going sideways 1st & 2nd + spinning 295wide tires thru 3rd gear = fun!
last time i did that my mom woke me up and told me to get ready for school...
Old 09-18-08, 09:39 AM
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i started to use regular and my engine started knocking and when i punch the gas it has a slower response, runs kinda slugish. so i switched back to supreme.
Old 09-18-08, 10:38 AM
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Lexus Cars Should Not Run On 87 Unleaded Gas, Ive Done It Before Because I Had No Choice, And Right After That I Used An Injector Cleaner, But The Next Fill Up I Used 93. I Work For Lexus And I See Cars In The Shop All The Time With Fuel Problems Due To The Use Of Cheap Gas. Plus The Gas Mileage Sucks Bad When On 87.


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