How do you determine which Synthetic Base oil group is used in the various oils marketed. I have downloaded most of the data sheets and MSDS but cannot decipher. I want to use the highest percentage of PAO in a 5w-40 oil in my 2005.5 TDI Jetta..I dont care about cat clogging as I will remove or disable it at the first sign of trouble though from my reading it appears that the higher NOACK values suggest that no oil is "burned" and therefore produces less ash to become a problem for the Cat.
It is my intention to add ZDDP to a fully synthetic group IV or V oil and at this oil change I will add a bypass filter (car currently has 107K)
It is my intention to add ZDDP to a fully synthetic group IV or V oil and at this oil change I will add a bypass filter (car currently has 107K)