Ok ok I'm part of the rotella cult. My dad has run t6 15w40 in his 2003 Dodge and 2002 Jetta TDI since he bought them. He got the Jetta at 60k miles, and it's almost at 390k miles. Original turbo. Cam and lifters were replaced at 300k because the spring inside 2 of the lifters broke, so they...