Another angle: Check the bottom of the bottle for batch number. Post it here for further examination. If it's something like "M02xxx...", it's probably the older pre-GC US made stuff. If it has "M04xxx..." or M05xxx...", and it's made in the US, then please let us know right away, as this is the dreaded US made replacement for GC. I've heard that there's some of this out there, but seen none of it in my area, and I DO look around to monitor supply. If it is new, US made 0w-30, I'm going to have to go on another stocking binge. . .