Has anyone run into a heavy oil or diesel smell entering the cab on the 01 Quad cabs? I bought a new truck and have changed the oil like the dealer said to do, since they apparently used a different , thinner oil at the factory. the smell is still there to some extent, after even beefing up the cowl ,firewall, gasket with a piece of 1/4 in. hose. It is really irritating on this otherwise great truck. The 3 dealers I called all acted like they barely knew what I was talking about. I can't believe Daimler would let a problem like this go unsolved. My wife is definetly giving me what for since our 92 Dodge was a wonderful truck with no prob. , especially this headache smell