edyvw
$50 site donor 2025
Manufacturers can do whatever they think it is appropriate. It is their approval. Amsoil nowhere states that they THINK this is tge way to go. They just throw there approvals making people believe that that is appropriate oil for their vehicle.Amsoil is just saying what the manufacturers refuse to do for whatever reason; that mid SAPS oils are backward compatible with full SAPS specs. I think most of us believe that Porsche C40 oils are suitable for A40 applications but VW/Porsche refuses to back-spec.