I took my 2010 F250 to RRF Humble because it was running rough. the engine in the truck was a new ford engine installed by Tipton Ford with less than 6000 miles and covered by a 5 year unlimited mileage warranty from Ford. The 1st indication of a problem was when JT, the service advisor, told me there was a $289 diesel diagnostic charge but was very vague as to what that actually covered. Then within hours JT called me and asked if I had the oil changed recently. I told him yes about 1000 miles prior. He then told me that the service tech told him that there was approximately 15 quarts too much oil in the vehicle and that they needed my approval to do a $200 oil change. I told JT that I would not approve the oil change and that I did not believe that was possible for the truck to physically hold 15 quarts above the rated oil capacity of 15 quarts. And then told him I was on my way to the dealership to talk to the tech. When I arrived, the tech removed the dip stick, wiping it as he removed it. He then immediately reinserted the stick until there was approximately 5" left out of the tube. Then instead of pushing the stick all the way into the crank case he removed it saying "see there is oil to the max fill line already and the stick was still 5 inches from being fully inserted". He then asserted that this proved there was 15 quarts too much oil in the truck. I then took the stick from him, fully cleaned it including the last inch where the measurement hash marks are. I then fully inserted the dip stick, let it rest for 5 seconds and then removed it. Amazingly this time the dipstick showed that the oil level was exactly where if should be. The tech took the stick and pointed out that there was minute amounts of oil higher up on the stick and would not accept my comments that there was always a little residual oil on the stick from the sides of the dip stick tube. I then asked the tech how too much oil would cause the truck to run rough, my original complaint. He told me that since the crank case was completely full of oil that the crankshaft was having difficulties turning correctly and this is what was causing the vibration I was feeling. I told him that was the most preposterous thing I had ever heard a mechanic say, especially in light of the 400HP 700FTLB of torque of the 6.4 diesel. When I told JT that I wanted to speak to the GM he immediately told me to just take my truck and go - no charge. I then took my truck back to the shop that did the oil change. We drained the oil back into four 1 gallon containers. The result of this test was that there was only 15 quarts of oil in the engine which is the specified oil capacity. So be aware, Randall Reed Ford of Humble service is not an honest operation.