Prozone Fuelsaver, The Fuel Saving Device Testimonials - Hong Kong 1993
Hong Kong Polytechnic (November 1993) - Department of Mechanical Engineering
| Tested | Before | After | % Change |
| Fuel consumption @ av. 45 km/hr (km/L) | 14.79 | 16.6 | 12.2% |
| Fuel consumption @ av. 60 km/hr (km/L) | 15.2 | 18.21 | 19.8% |
| Engine speed 3030 rpm | |||
| CO (%) | 1.0 | 0.39 | 61% |
| HC (ppm) | 262 | 165 | 37% |
| Engine speed 750 rpm | |||
| CO (%) | 0.814 | 0.218 | 73% |
| HC (ppm) | 221 | 150 | 32% |