All the Gear, No Idea?
The truth about manual gearbox tricks – do they actually work?
Coasting
The idea: By shifting into neutral and letting the car coast, you reduce engine load and save fuel.
The reality: This technique was more relevant in older carburettor cars, where cutting the fuel supply completely wasn’t always an option.
Modern fuel-injected cars, however, automatically reduce fuel delivery when the throttle is closed, meaning coasting actually wastes fuel rather than saving it.
Worse, it removes engine braking, reducing control and increasing wear on your brakes. Oh, and coasting downhill is technically illegal under Rule 122 of the Highway Code, as it reduces control over the vehicle, so best avoid this one!
Double-Clutching
The idea: This involves pressing the clutch, shifting to neutral, releasing the clutch, then pressing it again before shifting into the next gear. It’s supposed to improve gear changes and reduce wear on the gearbox.
The reality: This was essential in older cars with non-synchronised transmissions, but today’s modern synchros do the job for you. While double-clutching can reduce wear slightly and smoothen shifts in certain performance or classic cars, for everyday driving it’s unnecessary.
Short-Shifting
The idea: Changing up gears earlier than usual to keep revs low and save fuel.
The reality: This one actually works… to a point. Keeping revs too low can strain the engine and lead to ‘lugging,’ which isn’t great for performance or efficiency, but shifting up smoothly and sensibly (without labouring the engine) can improve fuel economy.
Rev-Matching on Downshifts
The idea: Blipping the throttle when downshifting to match engine speed to the lower gear, ensuring a smoother transition.
The reality: This works, reducing drivetrain shock, making downshifts smoother and kinder to your gearbox. It won’t save you fuel, but it can extend the life of your clutch and make for a much more enjoyable drive.
Engine Braking
The idea: Using the engine’s resistance to slow the car down instead of relying solely on the brakes.
The reality: A good technique when used properly. Modern engines shut off fuel when decelerating in gear, making this an efficient way to slow down. Plus, it reduces brake wear. However, relying on it too much can cause excessive wear on your gearbox, so balance is key.
