Some motor oils apparently contain a lot of esters. Redline I believe is one and some people believe that the German Castrol (0W-30) must contain a lot of esters because of the low pour point. Would these motor oils be able to actually clean an engine? After all, there are esters in Auto-RX and Neutra, right? How would these oils affect Auto-RX and Neutra? Would Lube Control still be effective in them?