Kuan,

Unlike you, I am not TOTALLY sure of the REASON, but your statement is correct otherwise. Like it or not, at this point in time, we are petroleum dependent. Economics will drive the next step. The government is TRYING to drive it elsewhere, but until it is economically justifiable it won't happen.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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