fuel for 64 gto

Asked by GR8guy123 Feb 20, 2017 at 06:27 PM about the 1964 Pontiac GTO Convertible

Question type: General

How do I fuel my 64 GTO? The manual
calls for at least 100 octane fuel and I'm
sure it assumes leaded fuel. The highest
gas pump option here is 91 octane. I do
have a couple of other options airplane
fuel (100 octane low lead) and 112 racing
fuel.

2 Answers

F_O_R answered 7 years ago

You could try unleaded premium with a lead substitute and an octane booster added and see how it runs. If it pings a lot try retarding the timing a couple of degrees. Airplane fuel is really expensive in my neck of the woods but you could try it too.

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Bob answered 7 years ago

Airplane has no road tax on it and it may be unavailable for motor vehicle use. I would have the heads redone with hardened valve seats and run 91 octane in it. I think the octane rating system has changed since 1964 so 91 octane might be enough, but it either needs leaded fuel or hardened valve seats.

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