Quote:

the displacement differences between any two different engines really has little to no direct correlation to the amount of their respective "dirty" exhaust emissions



Are we discussing the same thing, Dwight? Seems to me that a 5 liter motor that produces the same PPM NOx (for example) as a 1 liter motor is polluting five times as much.

'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy