Looks like its available all over SoCal now, not just NorCal.

76 station in Chula Vista:
$4.13 regular
$4.25 midgrade
$4.35 premium
$3.29 #2 diesel
$2.49 diesel HPR

Get the GasBuddy app and Propel Fuels app.

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CENSORED due to not family friendly words