This entire DUmmie post is pure industrial strength BULLSHIT!
If Walmart ruined their engine, Walmart will replace it. Their only problem is to prove that Walmart screwed up. Apparently they did, because they put them up in a hotel. (I hope they know how to use the shower and actually USE it.)
My step-son's girlfriend had her oil changed at Walmart, and they stripped the threads in the oil pan. (The only reason I can think of this happening is because they used an air wrench to tighten the plug. I've done fleet maintence on 6 one-ton trucks, each getting an average of an oil change a month, for 15 years, and not 1 stripped oil drain plug.)
Walmart replaced the oil pan on her Beetle, which cost Wallyworld $672 for the pan, $97 for the gaskets, and $200 labor....