This isn't a gas price thread

I'm always interested to hear what companies are the best, what companies get their oil from the same place, who puts what additives in their gas, etc.

Who else is like me and will only put a specific gas in their car?

I only put Shell Premium (v-power), or BP Premium in my 530, because I belive these to be the best fuels, and also, these stations (especially BP) are usually way nicer in terms of appearence, and pump condition.

Discuss.