I think a lot of this is the dealers do not have qualified mechanics case and point:
2009 F-350 dually v10 engine truck has 8500 miles. Truck starts to run like shit so we take it to the dealer. Dealer has the truck for two weeks and says there is a hole in the piston and the engine is blown. Now this vehicle was purchased from Ford and only serviced at the local ford dealer. Every aspect even oil changes was done exclusively by Ford. I go down there and say how did this happen it must be a defective engine. The dealer says your warranty ran out three months ago you are not covered the cost for a new motor is $10,000!!!
So I call Dearborn and bitch telling then that this is complete bull shit and that this truck must have a bad motor because the only thing it has ever towed was a 8000 boat three times. I inform them to look up the service records from their dealership to confirm its maintenance record. They kindly told me to go pound sand and said they would give me $8,000 credit on a new truck as trade in. I told them hell no since this truck is NEW and only has 8500 miles and should last another 150k plus.
I spoke to a few friends who told me to get a second opinion so I did. I had a tow truck go to the dealership to pick it up. They were in "oh shit" mode. They told me I was going to take it somewhere and they were going to "hack" it all up and the repairs would cost more $$. They reinforced that all of their mechanics had looked at the truck and the motor was bad. I towed it anyway and with an hour they were on the phone offering me $4000 in credit towards a repair if I brought the truck back that day.
I took the truck to a junkyard where they work on F series trucks all the time. The 23 year old uncertified mechanic delivered the truck to me the next day. He looked in the motor and found that the motor was in perfect order. No holes in the pistons nothing! What he found was the catalytic converter was melted. I have several other horror stories about the same Ford dealership doing bullshit like this. Its just sad that had I not gotten a second opinion I would have paid $10,000 for a motor I didn't need. I wonder how much of that goes on every single day??