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Old 04-05-2013, 12:49 AM   #9 (permalink)
EcoModding Lurker
Join Date: Apr 2012
Location: New Zealand
Posts: 46

Weird Thing - '00 Holden (GM) Commodore SS Series II
90 day: 18.67 mpg (US)
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Some engine builders have used this to increase compression on limited octane. That alone makes it worthwhile for engines running boost or high compression and pump gas. But it has to be done right, and you only need one groove per cylinder. Dimples could likely achieve the same result by raising the detonation threshold.
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