I do know that if you don't drive the truck every day and let it sit for any length of time, like a month or more, B20 is bad ju-ju. B20 has a bad habit of growing algae when it sits (been there and did that) with my farm tractors and pickup and the repairs can be very expensive, not just new fuel filters, but things like injectors and pumps. I stay away from B anything. B stands not for Bio, it' stands for BOGUS.
But you live in Kalifornia so be it as it may, you might be stuck with it. Guess maybe it's rime to move elsewhere....