In this paper, fuel consumption model of diesel engine for tractor is developed based on statistical analysis for a lot of test data to predict fuel economics of tractor.

Due to automotive performances test, a multi-function real-time data acquisition system is designed, which can measure the performances of automotive dynamics, fuel economics and brake.

Economics is precise about the tax that should, in principle, be levied to deal with negative externalities: the tax on a liter of fuel should be equal to the harm caused by using a liter of fuel.