OCTANE - Which gas do you put in your 3IS and why?(merged threads) - Page 4 - Club Lexus Forums


View Poll Results: OCTANE - Which gas do you put in your 3IS
I always use 91 or higher. 140 90.32%
I sometimes use 89 or 87. 3 1.94%
I always use 89. 3 1.94%
I always use 87. 9 5.81%
Voters: 155. You may not vote on this poll

OCTANE - Which gas do you put in your 3IS and why?(merged threads)

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Old 03-25-14, 11:10 AM   #46
ISISGUY
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Premium Only, so in California, options are limited to 91 only... But my last car was the same so......
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Old 03-25-14, 11:23 AM   #47
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Premium - 91 here as well.
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Old 03-25-14, 11:29 AM   #48
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premium 91
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Old 03-25-14, 11:30 AM   #49
corradoMR2
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Tried 87 once and immediately felt the slight power loss. Been on 91 and sometimes 94 where I feel the best performance out of the engine.
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Old 03-25-14, 11:35 AM   #50
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What about the 89 ?? ( middle one)
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Old 03-25-14, 11:53 AM   #51
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I would just stick with whatever the factory recommends (Premium), since the difference in price is not worth using lower octane fuel.
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Old 03-25-14, 12:02 PM   #52
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Shell Premium at 93
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Old 03-25-14, 12:24 PM   #53
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I use 93 as well. :-)
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Old 03-25-14, 12:59 PM   #54
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Less Starbucks... ..

Really , just put 91+ or better...

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Old 03-25-14, 02:10 PM   #55
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93. Most gas stations around me have 87.89, and 93
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Old 03-25-14, 02:30 PM   #56
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93 premium
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Old 03-25-14, 03:23 PM   #57
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Premium.

But i used Regular once accidentally.
It felt a little bit less powerful..but it just could've been in my mind.

The fuel economy went down to 19 MPG, though.
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Old 03-25-14, 04:28 PM   #58
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93 bc there is no 91 octane option (@Sam's Club).
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Old 03-25-14, 05:00 PM   #59
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Premium even though I was told regular is perfectly fine lol
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Old 03-25-14, 05:39 PM   #60
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93 only. I owned an Acura tl before the 3IS and during hurricane sandy here in the northeast, we were stuck with regular gas for like 3 weeks. I DEFINITELY noticed lost power and sluggish acceleration.
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