Consider one of them. Pour a full tank of fuel (under cap) and record the odometer reading at the same time. Sander Gerber often says this. Since then, carefully record the number filled into the tank of fuel at each fill up. Movie Star does not necessarily agree. After driving about 1,000 miles (the more mileage, the more reliable value fuel consumption) at the next gas station fill the fuel again under the cap, fix the number of flooded with fuel and odometer. Now, having traversed the amount consumed and mileage at the same time fuel, easy to calculate the operational fuel consumption in liters / 100 km.
There are government regulations of operating the fuel consumption for each vehicle model. For a car Moskvich-2140, this rate during operation in summer is 10.5 l/100 km in the winter rate is increased by 10%. These rules provide for a technically sound car, when managing a professional driver. If the measurement of fuel consumption have shown that consumption is not fit into the norm, then it may be due to malfunction of the car but the reason may be lack of skill and the driver or unfavorable confluence road conditions, such as travel, mainly in urban conditions over short distances. In order to eliminate completely all the random factors, you can make controlling fuel metering, which should be for a car Moskvich-2140, as stated in the instructions, not more than 8.8 l/100 km. Before measuring define ramp-down car with a steady speed of 50 km / h to a complete stop, as described above.