While filling up gas at the local Chevron station I got started talking to some guy about racing, and he mentioned that putting moth balls in the gas tank increases the octane. This sounds pretty strange to me... does anyone know anything about this???
I've heard this story and other ones that I won't repeat.
I personally won't put anything into my classic cars that Chevy didn't intend being there.
If you want high octane, find a local source for VP Racing gasoline. This stuff is available (at high cost) in just about any octane rating you want, and it has lotsa lead in it.
Get a 5 gallon can or 2 and add some to each tank. Your Octane will get a significant boost, and this way you are adding lead, which is exactly what Chevy intended for these engines.
If you're interested in experimenting, Tolulene has some potential. It's supposed to be in the neighborhood of 116 octane. But it is corrosive. So don't get it on your paint. And make sure your fuel lines stay healthy.
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