wondering what oil should i use. i want synthetic but dont know what brand to get. i always used mobile 1 but on the camaro forums some say to not use it and some say to use it. im really confused to what oil is best. i dont know if i should use Mobile 1,penzoil platinum, or valvoline.please some one tell me or show me some evidence to what oil will be best for my car. car has 500 miles as of now. 5W 30.