Sorry, This question just came to my mind and it supercedes my youthful reasoning capability. The Sham-Tec issue is a dead horse yes. My question is premised on the fact the Domestic market DOES want PA) or Ester based synthetic. Although the average joe may not know those chemical groups, they assume anything synthetic is akin to Mobil 1. So why go through all he trouble of European refineries and transatlantic cargo etc to import this stuff? North America certainly has the pre-existing industrial capability and there are literally thousands of jobless chemical, plant, industrial etc engineers that could staff the place to create this stuff right here in the States. Castrol....your corporate reasoning dumbfounds me.