Mazda Sky engine 13:1 runs 87 octane.
He calls the 14:1 CR "groundbreaking," though it's a lesser 13:1 in U.S. engines to accommodate our 87-octane regular gas. A "breakthrough" combination of technologies – including direct multi-hole injection, dual VVT, new-design pistons, a unique 4-2-1 exhaust system, shorter combustion duration and delayed ignition during start-up – prevents knock.
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Originally Posted by russv
12.5 compression ratio. Enough said.
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