i have been a staunch dino oil backer but i am going to change with my 03. syn is the way i am heading and it will be amsoil 30005w-30 or delvac 1 5w-30. the only consideration now is the price d/f. amsoil=$ vs delvac1=$ i dont need to be convinced or swayed, price will be the determing factor for me. thanks for any future response.