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Old 07-08-2010, 03:03 AM   #10 (permalink)
Dr. Jerryrigger
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Join Date: Jun 2010
Location: mass
Posts: 181

The Sh*t-Box - '99 Subaru Impreza Outback Sport
90 day: 27.81 mpg (US)
Thanks: 4
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From what I've picked up; emission testes are all based on PPM, not total pollution. So a small engine can fail even though its putting out less than half the NOx of a V8.
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