I would choose the filling station that offered full service, performed by bikini clad female attendants, and gave away a 16 oz. Lucite™ tumbler with the daisy design with each fill up.
It wouldn't make any difference to me, as I use diesel in my Sprinter.
But, if I used gas, I'd go to a gas station that was a retailer of Top Tier gasolines, which greatly exceeds the minimum standards for detergent additives.