[geeteeohguy]

Originally Posted by gto19

Thanks guys for all the great info . I think this stuff looks good because it has some lead and raises the octane. But your probably right about not needing the lead for regular driving but it probably wouldn’t hurt

Octane supreme

http://www.overkillgarage.com/octane-supreme.html

I've been using this for 15 years or more in my '65 GTO for the octane boost it gives. It absolutely works. My '65 GTO with the 389 has milled heads and a true 11:1 CR (I built it back in 1981) and needs the octane to avoid detonation. On my '67 GTO, which I actually drive a lot, I ended up swapping to lower compression heads and am able to run 91 octane pump gas.