Narfblast long time for me to write it but here it is. Sunoco Gold and their reg., diesel fuel are diff prices when I have every been at any of their stations. Sunoco Gold is like some 8 cents or more then their reg., diesel fuel. I still believe it is better and cheaper to add your own additive of choice. I find that the Amsoil Cetane Boost works very well and Walmart 2 cycle outboard motor oil for a lub. Some where here there was a link to the test on lubs[additives] for diesel fuel and the Walmart oil scored very high on the list, not the best but high. Some scored so bad that old dirty engine oil beat them out big time. The one bad one increased wear big time, so was a waste of money and was costly to your diesel engine and fuel system. For the claims of the oil companys on their cetane ratings of their diesel fuels, I do not believe them to be that high, they are only required to have a min of 40, so why would they put out anything higher and cut their profit down. Buy some from each brand and have it tested and I bet it will come out close to the 40 and most likely some below