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Discussion Starter · #1 ·
can you run the 89 tune with 87 octane gas, just a general question that I've been wondering about.
 

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Ok yes, you COULD do it...but dont. I COULD set my car on fire, but I wont. :D
 

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definately not,
your car will run slower because it will knock.

you can run the 91 with 93 :)
 
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