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      11-20-2017, 06:16 PM   #54
wdb
dances with roads
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Drives: 2007 Z4MC, 2007 3.0si Cpe 6spd
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Quote:
Originally Posted by Red Bread View Post
cars release a fraction of the total pollutants while being more efficient even on stupid ethanol fuel
I was reminded of the articles from the 1990's showing that the exhaust coming out of certain PZEV vehicles (Volvo, Subaru are the ones I remember) was cleaner than the air going into the intake, at certain times, on LA freeways. Air quality really has come a long way. ICE efficiency too.