Primus mentioned this in another thread, but I think it deserves its own post. Check out Veedol's web site. These oils appear to be the same oils that Castrol offers in Europe under the Castrol brand. I looked at the spec sheet for the Syntron 0w30 and it is IDENTICAL to the SLX, right down to the color: green. Why would Castrol produce and sell these oils under a different name/company?