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89 octane leaves no soot on tailpipes???

1116 Views 3 Replies 4 Participants Last post by  flylow
Did I read right??:dunno::dunno: Somewhere I read that using 89 octane leaves no soot on tailpipes. Is this true? :dunno::dunno:Has anybody done it? I'm about to play guinea pig and find out...Just waiting for a long trip so the 89 tank doesn't last too long...
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If the car is stock, then yes, it still leaves the tailpipes black, based on how the car runs rich/lean.
No need to play guinea pig. 89 will leave your ass black :)
Why go down to 89 and suffer on performance? Ill take cleaning black tips a few times a week over -hp anyday.
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