While it sucks some people are going through this, the vast majority of FA20 engines are holding up well.
There seems to be a common theme.
Either
1) they are boosted and either A) the tune is bad or B) something physical was done incorrectly in the install
2) The ones popping N/A have had niggling problems from brand new untill eventually they pop.
I'm yet to hear of a perfect running motor just suddenly pop out of nowhere at say 20k miles.
Good luck to those getting warranties
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