I wouldn't think so, I have an 05 Magnum RT (same engine) and I always put 5-20 synthetic in it, but whatever is on sale, sometimes Mobil 1, somtimes Castrol, other times Quaker State. I used to use FRAM filters, but got the scared out of me by a post on here about how bad they are. Like you I switched to Napa Gold recently. I've never had any issues with using different brands of oil