198K views · 16K reactions | This is a 1929 Mack AC! Engine: 4-cylinder, 5" bore, 6" stroke, 50 hp Transmission: 4 forward, 2 reverse speeds Top Speed: 15-20 mph #Iowa80TruckingMuseum #iowa80 #trucks #oldtrucks #truckhistory | Iowa 80 Trucking Museum | Facebook

It took a long time to get here. This doesn't just happen overnight. Mack Trucks has a long history leading the way with an integrated powertrain. Now the best just got better. With a new common rail fuel system and turbo compounding, it gets you there without breaking the bank. It can think ahead, saving you even more fuel. It respects the environment further reducing your carbon footprint. And now with low 13 and 14 speed Creeper Gears and multi speed reverse you can get the job done in the pi

The ultimate in fuel efficiency. The Mack HE Package combines our #MP8HE engine and a host of aerodynamic and fuel economy features to minimize drag, maximize profit, and increase fuel efficiency up to 9.5%. | Mack Trucks

590 reactions · 74 shares | Two drivers face off with the most fuel-efficient engine we've ever built. | Mack Trucks | Facebook

733K views · 23K reactions | It's the GOAT! The Pontiac GTO V8 engine rebuild. Presnted by RockAuto.com | Hagerty | Facebook