hi this is all new to me so was wondering what oil should i use and exactly how much do i need its for a sti ra v5 brill car i am in love also the car is only imported there is 45000miles on it would it b likley that it needs a timeing belt or would it have been done and all. the car was moded by zero sports but dont know wen says on the turbo zero sports and a few other bits but i dont know wot they are lol