Royal Purple is one of the top 2-3 synthetics on the market. There fluids in general are always my 1st choice when they offer a fluid that meets my needs. The Amsoil filters are very good. Just FYI. Royal Purple offers filters now too. They are made from some high quality components and should be a very good choice. Only drawback is they are only available at PepBoys and are not cheap at $15 each.