I have noticed the fuel tank at the end of the day is very warm alomost hot I know the weather has been hot also, but it still seems a little to warm it is an 05 cummins should I be concerned?
return line fuel is always hot. This will keep your fuel from freezing in the winter assuing you can get it started. This is why its not a great idea to run your tanks all the way to empty. The more fuel in the tank, the more it cools down before going back in the motor.