A friend had one of those. Had some halfway mechanic change the spark plugs in it and he threaded one in crooked and destroyed the threads and the car never ran right after that. Nobody could ever get it out either so they just always replaced three spark plugs instead of four.
How did that happen?
. I hadn't used a semi-full fill-up of premium in ages. I had recently maybe two tanks before threw in Gumout All in One Complete fuel system cleaner and it was down to roughly four gallons when I decided to go for the bonus fuel. Essentially the remaining four gallons are still treated with the pea additive along with the fresh QT 91 of 13 gallons. After filling up the five gallon jug and the 13 gallons I was two shy, so I gave them to an old man in a beater pickup 
on the other side of the pump for free. Personally he thought it started better but my thoughts we if he didn't drive much the fuel might have started to degrade and that higher octane might have brought it back to a reasonable number. Could also be if he has extensive carbon that higher octanes make older vehicles seem renewed.
The terminal on the right inspires negative thoughts.
Shoulda told him to pour a mixture of baking soda and water on it.
Doing that disqualilfies someone as being an actual "mechanic". Should be zero reasons for cross threading a spark plug except for zero mechanical skills.
A can of coke shared between both followed by plain water works well.
Funny you should post this, I came across this today and like the subtle, quiet mods it's enhanced with.
