octane

[nosliw]

stock compression on engine, 9.1:1. they recommend 92 or higher. i don't feel like spending that much. can i get away with 87? is there a chart i can look at that will compare psi:compressionratio:octane?

[ZSK]

You're fine on regular pump gas. I'm at 11:1 and run 93.

[nosliw]

thanks. wonder why they recommend 93....