octane boost

[Chevy454]

With the 10.2:1 I think I was mixing it 3:1 or thereabouts...with our current 12.2:1 it gets straight race fuel. We could probably mix it a tad now, though, as we only have 34 degrees total timing in it, but I'm erring on the safe side.

We usually have a drum of purple around, though, so I'd use that versus the actual additive out of a can...the stuff in the can turned the plugs colors, making them tough to read.