Octane Booster Fuel Additive

I've used toluene in a turbo Miata - we had been trying to set it up on a dyno display and didn't have a fan for its intercooler, so we needed an emergency octane boost to keep it from pinging. Two gallons from the local Sherwin-Williams did the job. Good thing it worked as we had to drive it several hundred miles home when the show was over.