On the 45 gallon drums that the 'doo dealers get their bulk oil in, they have had Castrol right on the labelling. Also, compare the containers the Castrol & 'doo conventional oils come in, they are identical except for the wrapper, colour of cap & the price.
"A bad day on the trails, beats a good day at work!" Revrnd
"We're on a mission for God" Jake & Elwood Blue
"Remember, if you haven't got anything nice to say, say it often." Ed the Sock
2004 Chev K2500HD
1986 Chev Monte Carlo SS