Hey everyone, my wife and I just purchased a used 2008 Aveo with 42,000 miles last Sunday. I understand that the operating manual says 5w-30, and I was under the impression that 5w-20 is a more standard weight for smaller economy cars in general that produces better MPG while still allowing for great wear protection, and in some cases even 0w-20 is used. Would 5w-20 or 0w-20 allow us to achieve higher MPG numbers while still offering optimal wear protection or should I just stick to 5w-30, thanks!