Well, I could go to Shell, Turkey Hill, or my choice of BPs.
The first two are TT. TH is the cheapest. BP is the closest.
I know that BMW is part of TT, but I think they also recommend BP.
Shell, last I looked was the most expensive 3.17/2.99/3.09 for the premium. Shell/TH/BP.
Both Shell and BP have 93. TH has 92.
But it seems that many times, pumps at the BP are down. (One time shut down by the state.)