Just realized I forgot the most important part:the engine was replaced with a slightly higher mileage one. My car is 2012 with 97k now and 95k at time of removal of the engine ,and engine was sourced from a 2010 one owner car with 110k miles which I saw running before removed. It’s has been almost two months now and 2k miles since all the repairs and replacement of the engine. Yesterday’s oil change was good, I decided to do an early one just to see how the oil is and it’s perfect. I have been checking for codes everyday and it’s good so far, also the underneath is dry.