What is disturbing to me is that there is no mention of BD quality or percentage on the site. Who knows what you are getting as in the blend or if they are still serving up the same old swill from a grease trap?
300L a month is a lot to some people and bugger all to others. 50L a week would be a big week for me but my friends Mrs uses around 150L a week in her 4wd going to work and back and my friend is using over 500L a week in his truck. 300L a month works out at about a tank ( 75L) a week. For this level of consumption, you would get around $12 back or about 11L of fuel. Not exactly going to add up to a round the world ticket at the end of the year thats for sure.
I think the real point that needs to be looked at is even if you are buying 4000L a month of their mystery juice, the BEST discount you are going to get is less than 10%. On the lower end of the scale, you are going to be getting maybe 3.5% discount.
I think if a shop were to advertise a 3.5% discount sale, most people's reaction would be " Big F**ing deal". But that is Marketing for you and it will probably win over a lot of people who are much less sceptical than me.
Some people will no doubt think that any saving is worthwhile but for me, it is more of a gamble with VP's notorious fuel quality than anything. It's going to take a lot of fuel purchase's to recoup the cost of an engine, a pump, injectors or just having your fuel system cleaned and filters changed if their giltch brings your pride and joy to a standstill.
If you are tempted to buy VP fuel, my suggestion is not only keep your receipt but a sample jar of each and every fillup you make!