This year I bought a 15 Camaro with the 3.6 engine 50k miles. Using the dealer ACdelco synthetic oil it doesn't use a drop but I switched to PP because I don't want to go to the dealer for oil changes. The problem is using the PP 5-30 it uses oil, 1/3 qt every 1500 miles. Is there any other oil I could use that's as good as the Acdelco oil? I don't want to go to the dealer to buy the oil.