i recently have pulled my old motor out and put in a used motor with 65 k miles on the stock bottom end and did a complete HCI swap with lifters, cam shaft , rr's push rods, etc.. when should i change the motor oil and should i put in another comp cam break in oil i have ? when i put the oil in few months ago i added the comp cam break in oil and was wondering if i need to put in another one or not ? also what oil does everyone prefer.. thank you