I had a friend I carpooled with in the early 90's who had a brand new 91 Ford Escort that he loved. It got 82 miles per gallon and he always bragged about it!
About 2 years after buying it he got a recall notice for some safety device. Once the vehicle was returned a few days later it never got better than 38 mpg. He swears it was a completely different engine when he got it back.

I'm just sayin....
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I'd rather be ignorant than stupid. Ignorance implies a lack of knowledge which is easily correctable through education. Stupidity implies an inability to learn. Therefore; ignorance is temporary, stupidity is forever!