This place is a mess. Even on weekdays lines can go out into the road during the worst of it.
Still for the price it's hard to beat, unless you have a Sam's club membership.
That being said the line is disorganized and it's not unheard of to witness road rage when someone tries to cut into the line. Costco attendants are usually on top of it, but not always.
Personally, I don't think it's worth the wait, but if you don't see a line definitely jump at the chance to fill up. ~Grey
gas station