8th Generation Honda Civic Forum - View Single Post - SI with 87 octane gas *Threads merged*
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Old 11-27-2008, 12:27 AM   #127 (permalink)
Itchytoe
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Join Date: Apr 2008
Posts: 682
Quote:
Originally Posted by IotaMan View Post
put 87 and octane booster to bring it up to 91 octane...lol
You should read those labels. Each bottle only adds about 1 octane to the rating so you'd have to add four bottles of booster to a tank of regular unleaded to get to premium unleaded's octane rating. Even then you'd only have the same octane rating and not the added detergents and other addatives that you get with premium fuels. I think the four bottles of booster will make that tank more expensive than just getting premium.
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