There is a 0W-30 Castrol motor oil being sold now. It is apparently produced in Germany and people at this site think that is has a lot of esters in it, because it can flow at such low temperatures.
I like using Auto-RX to help keep my engine clean. If I used this Castrol 0W-30, could I still use Auto-RX? Or would the esters in the motor oil conflict with the esters in Auto-RX?
I like using Auto-RX to help keep my engine clean. If I used this Castrol 0W-30, could I still use Auto-RX? Or would the esters in the motor oil conflict with the esters in Auto-RX?