Originally Posted by supersteve

All major brands of gas have the additives BMW likes us to use. Some only put the additives in their premium fuel. The "Top Teir" companies put the additives in all of their flavors of gas.

As long as you use premium from a major brand you will do no harm to your BMW.

If you want to use mid grade or lower I suggest you use one of the "Top Tier" gas brands as to get the valve cleaning additives BMW like us to have.

Alternatively, you can also use just about any gas and put in a bottle of injector cleaner if you prefer.