I just did an oil change with this stuff on the Explorer. I'll be honest, given Castrol's reputation in this part of the world for being shady, I was a bit weary. Their products shipped in here from Dubai barely meet any of the specs on the bottle, and are definitely no match for their German counterparts.
I had this stuff shipped in from the U.S. and given its country of origin, in it went. Noticed a bit of a sweet smell after breaking the seal, which certain did put a smile on my face. Mobil 1 0W-40 was a bit noisy in this application, and the engine has quietened down considerably. Other than that, it's too early to tell with less than 300 miles on it.