I have a mobile card and the card has all mobil fuels available. The only thing is that mobil doesn't give my company any discount on premium. We get a discount on standard UL but even that is only a discount off the regional price, not what is at the pump. Because of that I have only ever used Shell Optimax and never had any problems. That way I can also get 4c off per litre. Then get reimbursed for the fuel anyway.