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Old 01-20-2008, 06:42 PM   #1
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Default high grade fuel w/ Intense PCM for L36

Got a question for you L36 guys with an aftermarket PCM. What grade of fuel do you use? I'm curious if I have a knock problem from putting 87 in my car...
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Old 01-20-2008, 06:43 PM   #2
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why use 87 when 89 costs the same?
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Old 01-20-2008, 06:48 PM   #3
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Can we get a little more background? What makes you think you might have knock? Any actual numbers?
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Old 01-20-2008, 07:50 PM   #4
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I have a custom from from Sinister Performance (GM Tuners) and I use 93 Sunoco
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Old 01-20-2008, 08:12 PM   #5
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Why upgrade your car if you're not willing to put higher octane fuel in? The Intense PCM advances timing, 3 degrees if I remember, and some guys fight knock bone stock. Chances are, yeah, you're fighting knock. Only way to know is scan.
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Old 01-20-2008, 08:23 PM   #6
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I don't actually KNOW I have a knock problem... I was just curious what people used. I'm gonna put 93 in there for now on
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Old 01-20-2008, 09:36 PM   #7
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I've talked to Todd personally and asked him what octane I should run, he said 87 is perfectly fine and it'* what I've been running since I got the PCM back in August.
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Old 01-20-2008, 10:14 PM   #8
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I tune mine personally, and i ALWAYS run 93 octane,(95 when available) in the '96.
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Old 01-21-2008, 12:22 AM   #9
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87 should be OK, but if you are in doubt, switch to 89. 93 really shouldn't be neccessary unless you're having a tuning issue.
If you think you're getting knock, though, a scan would probably be a good idea.
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Old 01-21-2008, 04:42 AM   #10
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Quote:
Originally Posted by harofreak00
why use 87 when 89 costs the same?
its ten cents extra up here...
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