Oil level is spot on. Prepping for an oil change in the next 500 miles though it is pretty clean. Running 5w30. It can get below -25f here but this year we have yet to get below 20f. Truck has 77,000 on it. Bought it this past August. It runs beautifully, tons of power. Never gives me issues. Just noisy.That is pretty noisy. I think its the injectors but it almost sounds like lifters to. Simple question have you checked your oil level? Second what weight oil are you using? I assume iowa gets pretty cold so running 5w30 is probably a good idea. How many miles you have on the truck?