I have a 2010 Camaro SS with the 6.2 engine. I bought the car at around 4k miles. Since the purchase I have been using Castrol Edge 5w30. I change my oil around every 4,000 miles. Now I do mostly city driving but still a fair amount of highway use. I also have a tendency to drive hard. I'm interested in everyone's recommendation. I would prefer something I can pick up at my local Autozone, or Advance Auto Parts. The car takes 8.6 quarts of oil with a filter change so it can get quite expensive.