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Just curious. How is it that Mazda’s new SKYACTIV-G 2.0-liter engine uses a 12.0:1 compression ratio and requires only 87 octane fuel and the Subaru 2.0 liter engine uses a 12.5:1 compression ratio and requires 93 octane? (The Mazda 2.0-liter engine produces 148 lb-ft of torque compared to 151 lb-ft for the Subaru. Power output is not that different.)
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