I been very busy this afternoon, but I got a call from Amsoil a couple hours ago - pardon the random bullets (in no particular order):
1) They don't believe for a second that you are lying or scamming. The people I spoke with remember speaking with you, and how polite you were given the circumstance. The only comment they had, was a few times it was hard to get a hold of you (who isn't like that?) so that's the reason for the letter.
2) This is being investigated to this day. The Production Manager, lab people, management, warehouse folks, tech services are all involved. They have not let it go….they just have hit so many dead ends. But they still consider it under research.
3) They still have full pails of this lot in stock. The product is all normal. It matches the lot records, and it matches the lot retain. They have pulled some other material and it is fine as well.
4) There have been no other complaints anywhere.
5) It's weird that the tech did not send you a sample container and a returns form. This typically costs nothing to the customer.
6) I also asked about why the 15° C difference in the pour point didn't send bells a whistles off - two basic reasons 1) The test is simply not that accurate and 2) You had told them you were pouring at 5°F or so, and the pour points are still lower……
7) I asked why they didn't insist on getting the bucket back for further investigation while their was some good fluid still in it. The reasoning was as stated, they figured the sample was representative. (That would have been the smoking gun!)
8) They are being reasonable and have not ruled out customer good will even if they simply cannot figure this mystery out.
I gotta run, I took notes, but something else might pop in my head.
EDIT - holy whack I just saw your last post!! Good luck on you. I'll pray for you.