don't propose stupid questions thenDon't play stupid![]()
there is way to much ambiguity in your question that really its no different than choosing a party.
what if the car that needed the new engine was a $100,000 car that just needed a 10K engine to be back and running?
what if the car that just needed tires was a 1987 Honda civic?
At the end of the day, neither party has everyone's best interest