As noted in a comment on our last WSGPW post, Admiral/Cali Chev has plunged further, now down to $3.09/regular. And Delridge (by Home Depot) Arco is no longer the second-lowest; it’s still $3.15, but Exxon at Cali/Andover is down to $3.11, and Charlestown/Cali 7-11 has posted $3.12. Note the key word “posted.” A WSB reader e-mailed to say he filled up with one of the higher grades at that 7-11 tonight before noticing the pump price was higher than the sign price. Prices have been changing so fast – check before you pump.