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Steves68Nova · 07-06-2009, 09:58 PM

I was wanting some input on gas octanes. I have a 468 BBC with 14.5 compression. I am running Sonoco Maximal.

The plugs burn with a black to them, but I never have a miss or detonation. They are never a clean brown color like I would like to see. But I have read that if you "over-octane" your not going as fast as you could because the fuel burns slower.

Does this fuel sound like what I should be running? I have thought about changing to Sonoco Supreme next time. Or maybe even changing to a VP brand. I am very scared of damaging the engine by not running enough octane. But either of the above should be fine I believe. I look at the charts of these fuels and am lost. All this specific gravity and Research/Motor Octane stuff gets me LOST!

Also what does this oxygenated stuff mean? Is this something I should be looking for?

07-06-2009, 09:58 PM	#1
Steves68Nova Member Join Date: Nov 2008 Location: Rudy, AR Posts: 125 Likes: 0 Liked 0 Times in 0 Posts	Octane I was wanting some input on gas octanes. I have a 468 BBC with 14.5 compression. I am running Sonoco Maximal. The plugs burn with a black to them, but I never have a miss or detonation. They are never a clean brown color like I would like to see. But I have read that if you "over-octane" your not going as fast as you could because the fuel burns slower. Does this fuel sound like what I should be running? I have thought about changing to Sonoco Supreme next time. Or maybe even changing to a VP brand. I am very scared of damaging the engine by not running enough octane. But either of the above should be fine I believe. I look at the charts of these fuels and am lost. All this specific gravity and Research/Motor Octane stuff gets me LOST! Also what does this oxygenated stuff mean? Is this something I should be looking for? __________________ Steve Prado Rudy, AR S/ST4202 H/R 4203 Last edited by Steves68Nova; 07-06-2009 at 10:14 PM.