This is now the standard price-comparison service they offer; there don't appear to be any supplier price comparisons.
By the way, you might want to try an independent BoilerJuice-style service: The Heating Oil Club. It gave a worse quote for me, but is definitely one to try as it gives an instant figure.
|Under a month ago :|
|Under three months ago :|
|Under six months ago :|
|Over six months ago :|