Independent field validation by NUST, Zimbabwe
Passenger cars
−14.11 %
Fuel consumption, all four cars
−19.75 %
Petrol cars
−8.45 %
Diesel cars
none observed
Adverse effects on engines
Endoscopy showed cleaner cylinders.
Assessing nationwide adoption would call for a larger number of vehicles; NUST recommends extending the trials to fleets as the next step.