13. Ford 300 CID I6 Engine
Even though the 300 CID I6 engine isn’t as popular or well-known as other units on this list, it deserves a place here. This was Ford’s base truck engine for over 30 years, from 1965 to 1996. You could find this engine in millions of Blue Oval trucks and SUVs. Introduced in the mid-60s, the 300 was an evolution of the regular line of Ford’s inline six cylinders.
With around 150 HP and 250 lb-ft of torque, it had more than enough power for F150 trucks. Ford even used this engine in bigger trucks. But, they equipped it with a better intake system to produce more torque for towing more weight. The secret of this engine was its simplicity and high-quality engineering, making it durable and tough. This is something that truck owners appreciate.
Interestingly, Ford discontinued the 300 CID more than 20 years after its production. However, they still use this engine in some UPS trucks. This only proves the quality of the original concept.