Guys, let me teach you something many drivers don’t know. This gauge here is your RPM — it tells you how fast your engine is spinning, not your speed. When the needle is in the green zone, that is the best place: Safe, smooth, and fuel-saving. Always shift up around 1500 to 1800 RPM, and shift down when it drops below 1000 RPM. Avoid the red zone unless it’s an emergency that’s where you waste fuel and stress your engine. Remember, drive using your RPM, and your truck will thank you

World’s Fastest Car Before Bugatti Was a Tuned Porsche 911! RUF Yellowbird Explained | RUF Porsche

How to Calculate Pulley Diameter or RPM

What is a Tachometer? – Types, Working Principle!! How Techno meters Work and Different Types

What Are The Different Types Of Tachometers? - Air Traffic Insider

Tachometer and types of tachometer and uses