My personal opinion. After the 1st engine started pushing up daisies, I would not have returned to that drum again for an OCI. I would have went to Walmart, got the correct oil, do the OCI, then open a huge investigation on that drum on it's contents... I would have taken the pump off, and shove a stick down that drum and see what came back. My gamble is that something got in it. Have you used this same exact stuff in the past ?????....without any catastrophic failures ????....on the same engines ?????