0W40 will probably have HTHS in 3.6-37cp range. Noack probably around 9%.Sorry-got dropped there. As I started to write, There were some concerns raised about Novak levels and HTHS in the Castrol 0w40 reformulation. Any thoughts or also any opinion about flash point? I do like Edyvw’s idea about Castrol 0w30.
Thank you again and looking forward to further discussions with you. Jerry
It is their premiere product, they can’t drop ball too much.