The secret they leave out is that the factory fuel pump can't handle the higher viscosity. Your pump is probably burned up, and your new one will probably go just as fast. For that matter, I doubt you would see a consistent fuel pressure reading if you checked your new pump after you get it in, which would explain your loss of power. This will eventually kill the injectors, and possibly coke the cylinders enough to make your rings stick. I have heard of a couple people that swear by DSE Blends, but I would like to hear their opinion on it after about 50k miles. I would also like to see DSE do a tear down after 50k and see what the combustion chamber looks like. Maybe a compression test as well.
Here is a update. I replaced the pump and it did not last long. I then installed a FASS 150 fuel system and have been making Bio.
This was a win - win for me. I am not looking back and only looking forward. Using bio while towing a 16,000lbs - Goose neck has been easy. The cost of making bio is .58 cents a gallon and the truck has been running great. The process will take time - pick up the oil, process, filter and re filter.
I make the fuel to tow the trailer 2,000+ mile trips.
The stock pump would never be able to handle the WVO. I did notice that the stock pump did not like the Bio either. The Ford pumps are designed for diesel fuel use only.
The money I have invested to run Bio, I have recovered in the savings of making my own fuel.
I feel using WVO was not the right choice fro what I need it for.