[svandamme]

shell has Shell GO+


If cost is your goal : just refuel in the cheapo gas stations that don't do reward schemes.
only for vpower which is the expensive juice with detergents and no bio crap

Why would you care that they got biocrap in their fuel,
why would you care bout detergents

I assume you'll be running a rental ar, so get the cheapest fuel you can find and it will be lower then the reward schem on expensive premium fuels