For efficient driving of a vehicle with a working synchromesh manual gearbox whose manufacturer does not require double-clutching, how should you normally change gear?

Correct answer

Without unnecessary double-clutching and following manufacturer instructions.

Without unnecessary double-clutching, following manufacturer instructions and selecting a gear suitable for speed, load and road conditions. Double-clutching involves two clutch operations with an intermediate neutral stage; it is not simply accelerating with the pedal depressed. In this situation it adds unnecessary operations. There is no requirement to pass through every gear: skip ratios only when the vehicle and conditions permit it without straining the engine or losing control.