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What octane gas do you use? (The Mother thread)

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Old 12-23-05, 10:36 AM   #16
Tammy
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No deleterious (harmful) effect..
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Old 12-26-05, 10:11 AM   #17
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just for the record, midgrade in denver is 87 octane.
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Old 12-26-05, 10:42 AM   #18
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If you hear no audible knocking then you are not doing damage to the engine. There is no difference in the cleansing capacities between different grades of fuels so don't buy into that argument either. Lower grades will not clog your fuel injectors.
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Old 12-26-05, 11:17 AM   #19
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i use regular (87 in california, the lowest grade) on all my Lexus (brand new 05 LS and 98 LS as well). i don't think there is any harmful effect (or so i hope )
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Old 12-26-05, 12:48 PM   #20
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regular is 85. everything is different at altitude.
i don't floor it. to me its a luxury car, not a sports car.
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Old 12-26-05, 04:12 PM   #21
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ive always put premium in my 93, i tried the midgrade once and there was a noticible change in the smoothness of the car. I think its wiser to follow the manfacturers reccomendations
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Old 12-26-05, 07:47 PM   #22
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premium here is 91.
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Old 12-27-05, 12:01 AM   #23
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I also have a 93 ls400 and ever since i've had it, i've put premium (91). The manual states: "premium unleaded gasoline with a research octane no. 96 (octane rating 91) or higher. gasolines with an octane numberas low as 91 may be used if premium unleaded gasoline cannot be obtained." I'm in California and premium is 91.
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Old 12-27-05, 09:00 AM   #24
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Will 91 ethanol work OK?
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Old 12-29-05, 07:28 PM   #25
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Premium fuel is required for the high compression engine. The higher temp burn reduces carbon build up on the cylinder heads, valve stems, valves and exhaust ports. The way I see it the engineers that build these engines know what they are doing and I will pay the extra $10-15 a month for the premium.
Just my .02 worth
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Old 12-29-05, 10:09 PM   #26
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i have found at our altitude with my 93 when i run 85 i get around 320 to a tank i put in 91 and i get around 410 or so. it is a wash at the pump the way i see it
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Old 02-05-06, 07:56 PM   #27
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Default What kind of gas do you put in your car?

I've been putting in 93 but I read in the paper about putting 89-90 in and the car they used for the example was 1990 LS400. I was wondering what everyoe uses and if 90 is ok to use.
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Old 02-05-06, 09:32 PM   #28
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if the prices for premium go over 270 then im switchin back to regular

its like 265 right now
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Old 02-06-06, 12:15 AM   #29
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i put in premium. i have to, i dont want to take a chance. do what the book tells yah, and suck it up. ***** the car, coast it whenever you can haha.
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Old 02-06-06, 02:55 AM   #30
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93 only...
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Old 02-06-06, 02:55 AM
 
 
 
 
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