a nissan dealership will look at a det like a DE motor its the samething with lower compression pistons and oil squarters, but most nissan dealerships i know donot want to work on cars that are over 10 years old. the oil pan is super easy to pull off but sometimes when takeing it off youll have to tap down a side to make sure its flat. the SR20 is so easy to work on and theres a decent amount of room to do it, amagine if it was a timeing belt driven motor then you can say its a pain