I have used 15w40 rotella in most of my dirt bikes for several years. I saw it in a sivler/grey jug a while back and i saw it was a synthetic blend. Anyone know what the percentage of syth vs dino is in it and have any of you guys tried it? I run 15w50 M1 in my XR650R but will more than likely try the blend next oil change.
Just curious.
Just curious.