all this ZDDP talk is spining my head,,dont know what or who to believe,,
i called valvoline,and talked with them,,,they told me the normal VR-1 has 1300 ppm,,they also told me,, the VR-1 marked off road,not street legal, is formlated for racing,,,500 miles max,then it starts to break down,,they tolsd me the regular VR-1 has plenty of ZDDP,,, but im going to look in to a additive,,which i have never believed in,,,
and from what i have read,,i have a dodge pick up with a cummins diesel,,so i read some of the diesel info,,as of 2007 goverment mandate,,new formulated diesel fuel,,ULSD,, ultra low sulfur diesel,, is now what at the pumps,,,emmissions,oder,,ETC,, so the diesela has been reformulated also,,less ZDDP,, because of the particulit filters, so from what i read the shell rotella T you now buy in the stores,,has less ZDDP but i dont know how much les or how much is in that oil these days,,,
im trying to stay away from the synthic oils,,to many horror stories about leakage using that oil,,,
any new info ??? whats every one using??