I sometimes wonder how much people know the show before they start writing these things? The Impala is not a manual transmission. You ever seen Dean shifting gears all the time while driving? Nope, 'cause it's an automatic. And the boys don't stay in hotels. They don't have to use a key card to get into any room. The places they stay at are old, run down, and use old fashioned keys in the door locks.
On top of that the characterizations were off a bit. Sam telling Dean to "Shut the cake-hole, that's an order"? Uh, I don't think so. The other way around I would buy, but not coming from Sam. I don't care how out of it he is after "Mystery Spot".
I couldn't even finish reading the thing by this point. I'm done. Out it goes.
Sorry, just had to rant a bit there.