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Old 04-25-2012, 12:37 PM   #538
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Join Date: Nov 2011

Originally Posted by SZRimaging View Post
Ok, I have to ask this, and don't fault me for it. What would a car be doing burning more fuel to meet PZEV standards? I just don't understand how that would work, as I would think using more fuel would cause more waste.
It is burning more fuel to heat up the catalytic converter faster to reach the point of cleaner emissions. Also the engine operates more efficiently and burns fuel better when it reaches operating temp. With a cold cat and a cold engine block, there is a lot of pollution coming out the tailpipe.
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