LT1-LT4 Modifications 1993-97 Gen II Small Block V8

quick octane question

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Old Apr 2, 2007 | 08:04 PM
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Default quick octane question

a quick search yielded nothing. what is the manufacturers recommended octane for a 1996 lt1. i dont have an owners manual or window sticker.
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Old Apr 2, 2007 | 08:11 PM
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91/93 depending on where u live
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Old Apr 3, 2007 | 10:11 AM
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depends on the LT1. is it in a B-Body or F-Body/Y-Body? B-Bodies can do regular, and F/Y-Bodies require premium.
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Old Apr 3, 2007 | 02:10 PM
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f-body. im just making 100% sure between 89 or 93 octane
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Old Apr 3, 2007 | 07:58 PM
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Originally Posted by landstuhltaylor
f-body. im just making 100% sure between 89 or 93 octane
93 for sure
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Old Apr 3, 2007 | 10:36 PM
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I have a 96' LT1 and looked it up in the manual a while back. It said premium premium premium. "91 or higher" if i do recall
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Old Apr 3, 2007 | 10:39 PM
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If those are your choices, go with the higher octane. It will run on the lower octane, but the PCM will retard timing (and power) to compensate.
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Old Apr 3, 2007 | 10:46 PM
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do not run the 87 its sucks and you get bad gas mileage and your car will run like ****
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I had a 96, It says minimum 91 octane. I have once or twice ran 87 in it without noticing anything. But I wasn't driving the snot out of it, if I did I would notice it. That was right after I bought the car. I always ran 93 and ocassionally ran 91 in it. 104 runs really nice, motor feels really smooth and strong no matter what RPM.
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Old Apr 4, 2007 | 12:49 PM
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thanks guys. 93 it is!
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Old Apr 4, 2007 | 01:36 PM
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My 96 has a tune for 91 but it gets 93 or 94. 91 is hard to find around here lol.
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