If you can't empty the tank manually then I would see if any of your local performance shops carry "Torco Accelerator". It's the only octane booster I have seen work very well and 24-32oz should bring your octane up enough to drive it like you stole it.
Only downside, it's not cheap. It's about 20-$24 for a bottle which is 32oz. It works great though.
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'08 Infiniti G37s - Forced Induction Fed
Last edited by Staples; 07-03-2014 at 11:11 PM.
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