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Octane Question

 
Old 02-15-2007 | 12:35 PM
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Default Octane Question
I have a 95 lexus sc 400 the v8 and was wondering do i have to run premium does it really matter or can i just run regular or midgrade. what are the pros and cons and will it mess up the motor if i dont run premium
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Old 02-15-2007 | 02:43 PM
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Default Re: Octane Question
It will say how low you can go in your owners manual.


Usually if you have a kinda high compression ratio then you use at least 91 octane.
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Old 02-15-2007 | 02:44 PM
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Default Re: Octane Question
the owner manuel just says 93 octane which is premium but its just a v8 how would regular hurt it?
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Old 02-15-2007 | 02:45 PM
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Default Re: Octane Question
and its hard to find 91 only race track has it and that is there highest octane every where else is 87 89 93 i believe
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Old 02-15-2007 | 02:48 PM
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Default Re: Octane Question
if it says premium, put premium in it.
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Old 02-15-2007 | 02:50 PM
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Default Re: Octane Question
It would hurt performance, sometimes cause hard starting or no start. I had a GSR(JDM) with a 10.6 to 1 c/r, one of my cheap friends put in cheap gas. The next day my car wouldnt start till I figured it out.
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Old 02-15-2007 | 02:52 PM
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Default Re: Octane Question
Originally Posted by 4drjdmteg
and its hard to find 91 only race track has it and that is there highest octane every where else is 87 89 93 i believe
use 93 then
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Old 02-15-2007 | 03:07 PM
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Default Re: Octane Question
damnit i was tryin to save gas money sometimes gas goes quick in a v8 need to drive my turbo laser again get 34 mpg on premium instead of 18-24 damnit man
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