Motor oil weight for triton v10

When we had our 2005 gasser with the 310 hp I used the 5w20 as the manual required. No matter what vehicle we owned, I always went with what the manufacturer recommended. As mentioned, many people feel that the manufacturer is just trying to cover their butts. They test every part of the vehicle for hundreds of thousands of miles. Our new diesel pusher says to use 15w40 and change it at 18,000 miles or once a year.