While on the subject of Fluid, I'm going to have only the pan dropped and filter and a refill of the fluid. My question is: how many quarts of DexIII should I buy for the refill? Also, should I go with the AC Delco Filter or will a Hastings or Purolator Brand be okay. I have 140k on the car and this will be the first time that I'll be dropping the pan. Don't know if the previous owner ever did it or not. Thanks.