ANSWERS: 2
  • Yes, this engine will run fine on 87 octane regular unleaded. Please keep in mind that octane ratings listed for older engines were determined using the "research" octane number, then came the "method" octane rating, which was vastly different. Current octane ratings are an average of the 2, and aren't significantly lower than older numbers, just figured differently.
  • 8:1:1 87 octane unless the engine has been modified like bigger stroke

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