Always ALWAY$ the cheapest gas in the valley that I trust. I check Gas Buddy all the time!
I always fill up my little car here but prepare to wait more than 5-10-20 minutes on any given day and time.
But while your waiting - Pro Tip: Please have your Costco card and credit/debit card ready BEFORE it's your turn. I hated watching the gas guzzling hummer gym rat dude struggle to find payment in his wallet AT the pump with 4 cars waiting.
- he was queued for 10+ minutes before his turn.
But if you forget your card just run into the main store and get a temp card and then the attendant will unlock the gassy goodness of Costco for you. I've even seen them pump gas for an elderly lady!