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Originally Posted by zimbop
Also, I don't believe there's anything magic about the hybrid as an emissions scrubber. X amount of gasoline burned in a hybrid ICE has relatively the same emissions as X amount of gas burned in a ICE without hybrid. You have to burn less gas to make less exhaust, or am I missing something? Getting more power for the same emissions is not going to eliminate any smog, it will just help us make smog faster.
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I won't claim to be an expert in answering this, but I do believe that there is something "magic" about the hybrid in reducing emmisions. They are not rated as SULEV vehicles simple based on the reduction of gas consumption or their overall MPG. If that was the case I don't see how the Highlander could ever be rated as SULEV since it has the same V6 engine as the standard Hybrid which is not an SULEV. The hybrid drivetrain is allowing them to tune the engine in such a way that it reduces tailpipe emmisions.
I am sure someone here could explain this better. I think I saw a thread on this at one point in time. I will take a look and if I find something post a link.