As of our most recent check, the Arco by Home Depot on Delridge (left) has taken over the “lowest posted price in WS” spot: $3.27/regular. For the gas seller’s perspective, here’s an interesting article; for an attempt to explain the relentless rise, this report blames it on lower refinery output attributed partly to attempts to make slightly cleaner fuel. 9:58 PM UPDATE: WS’s costliest gas, premium @ Admiral Chevron, is up tonight to $3.81.