| Vehicle | Model Year | Gases | unfiltered | with filter | % Rem. | |
| Corsa | 2007 | CO | % Vol | 0.19 | 0.02 | 89 |
| HC | ppm | 13 | 5 | 62 | ||
| CO2 | % Vol | 15.90 | 15.80 | 0.6 | ||
| NOx | ppm | 335 | 16 | 89 | ||
| Nissan Tsuru | 1997 | CO | % Vol | 0.66 | 0.57 | 14 |
| HC | ppm | 370.4 | 128 | 65 | ||
| CO2 | % Vol | 11.52 | 11.06 | 4 | ||
| NOx | ppm | 108 | 83 | 23 | ||
| Nissan Tsuru | 1999 | CO | % Vol | 270 | 160 | 41 |
| HC | ppm | 134 | 101 | 25 | ||
| CO2 | % Vol | 14.19 | 10.06 | 29 | ||
| NOx | ppm | 468 | 6 | 57 | ||
| Nissan Tsuru | 2008 | CO | % Vol | 0.52 | 0.02 | 96 |
| HC | ppm | 6 | 5 | 17 | ||
| CO2 | % Vol | 11.71 | 8.9 | 24 | ||
| NOx | ppm | 19.2 | 5.6 | 70.8 | ||
| Chevrolet Chevy | 1998 | CO | % Vol | 3 | 0 | 100 |
| HC | ppm | 2.4 | 0.02 | 99 | ||
| CO2 | % Vol | 14.69 | 14.02 | 4.6 | ||
| NOx | ppm | 15 | 3 | 80 | ||