What is the actual fuel consumption of the Jetta?

[MelanieMarie]

For the manual transmission, the average fuel consumption is over 7 liters per 100 kilometers when the air conditioning is not in use. There is no single accurate figure as fuel consumption depends on numerous factors, including the age of the car, the driver's habits, usual driving environment, road conditions, etc. Below are some factors that may lead to increased fuel consumption: 1. Faulty or improperly adjusted ignition system; 2. Improper adjustment of the carburetor main jet; 3. Excessive wear of pistons, piston rings, and cylinder walls; 4. Improper adjustment of the fuel pump and injector in the fuel injection system; 5. Poor sealing or excessive valve clearance in the valve mechanism; 6. Engine temperature being too high or too low.