I have been a fan of Shell Rotella T full Syn. oil with my previous bikes. While snooping around in the automotive section at Wally World I was looking at their oils and specifically at what kind of NON energy conserving slection they had in synthetic oils. At the bottom of the oil rating logo where they normally put "energy conserving" (if it is this type of oil) Shell Rotella T Synthetic has C1-Plus 4 (or something to that effect). Maybe this has always been on the label. What does it refer to? Just want to make sure it is not some sort of energy conserving jargon.