That’s why I would not buy one smaller engine, same or close to the same horsepower means shorter lifeI guess it depends on how hard you work it. My Chevy 1500 has the 5.2 & tows my 21' boat with ease, a little over 7,000 pounds. Looking at the numbers of the 4 cylinder turbo that Chevy offers in the truck they are about the same as the 8 cylinder, but the 4 would be working to the max every tow.