Friend is a JD mechanic and he asked JD corporate. He was told it's made by both Chevron and Exxon-Mobil. The Western states (West of the continental divide) get the Chevron product and Midwest and Eastern states get the Exxon-Mobil product. Both companies blend to the same JD spec.
He found out when he called JD corporate, they asked what state he was calling from...