BP’s tankers occasionally return to Valdez with millions of gallons of Alaskan oil on board, reports The San Francisco Chronicle, the Houston Chronicle, and the Fairbanks News Miner. With Valdez holding tanks 90 percent full, tankers top-off and return again to West Coast refineries that are still too full to receive their loads, because BP’s refining and retail capacity is maxed. Clearly BP is prioritizing just-in-time delivery to meet the maximum market share and profitability of BP’s West Coast refined products.