I looked up the mpg difference in the Civic ULEV vs. PZEV. The drop was only one mpg city, with either transmission. Manual trans highway mpg was the same. CVT was 1 mpg HIGHER with the PZEV on the highway.


So, overall, not a lot of difference in the Civic. That doesn't confirm whether switching to PZEV was a cause of the mpg drop in the Accord, of course.