Should we boycott a certain chain of gas stations?

We all have to have gas, thats a given. We do not have to buy from exxon for example. Instead of not buying gas we should stop buying from one certain chain and see if their prices drop to stay in business. any thoughts?

There are campaigns in Britain to boycott Esso and BP. These are the 2 largest UK firms (So im told). I ride i bike so I dont use petrol but I think every1 should do boycott them!