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Message: [QUOTE="TARM, post: 307622, member: 578"] Doesn't lower CR also help with reduced emissions or at least lower NOX. You have lower heat there for lower NOX and the lower CR supposedly allows for a more even fuel to air mixture. IIRC the new Mazda diesel is dropping all the way down to 14:1!!! It will meet all Europe and US with no after treatments only a DPF. The CR is interesting given that is what they raised their gas engines too so both are running the same 14:1 CR!! With HCCI on the gasoline side of things right around the corner it looks like spark plugs are on their way out. The new 2.0L D engine has a 5600 rpm limit and is suppose to pull down 40 mpg in the full size car M6 It will even be offered with a manual trans. [/QUOTE]

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