Octane Supreme (formerly Lead Supreme)

[mockingbird812]

Rob,

No, I didn't feel you were pointing fingers. Yours was a good point, that is why I started off with, "For what it is worth..." (obviously not worth much unless you take actual measurements).

So any rules of thumbs that you use? i.e. when the moon is in the 7th house, and Jupiter aligns..... I use XX octane.

Thanks,

[Chevy454]

A rule of thumb? Keep a close eye on your plugs. I was never a fan of octane stuff in a can because it colored my plugs funny and made 'em hard to read. It's definitely better to err on the side of caution, though.

[tirebird]

I've been using it for some time now. Before rebuilding the LS6 I used it in any tank of lousy California ethanol diluted 91 octane. I wouldn't use it when I filled up with 100 unleaded or 110 leaded at the local track. Now that I've rebuilt the LS6 with 9.5 c.r. heads/pistons, I don't use it that much. However, when I do throw a bottle in, even with the lower compression, my SOP feeling is the car is more responsive and powerful. But that's not science, just my impression.

[mockingbird812]

Just returned from AZ emissions station this a.m. with the subject car. I filled the tank prior to this with one quart OS 130 and the rest with 91 Octane gasoline. According to the Kemco chart my 18 gallon tank with 1 qt of OS130 shld net a 5 point octane rating gain or 96 octane. Car ran beautifully and strongly and I passed the emissions test loaded and at idle for HC and CO. Will monitor plugs and performance as the ambient temps increase. I don't put many miles on this car.

Thanks for your inputs.