I have considered the dual tank system many, many times. However I can't justify the cost: $800 for the kit and $1,000 for the installation from greasel.com, located in MO about 7 hours away from me. Include the cost of driving down there and staying in a hotel and I've got $2,000 into the car.
The system of just putting the WVO in my diesel tank sounds good, but I can only do that in the summer or else the WVO would just freeze up in the winter. I know that I need to obtain several filtration products to get rid of food particles and water from the oil prior to putting it in the tank (same would apply if I got the dual tank system) and I can't quite seem to get the time to research all that information. If I could get a website that lists the entire procedure as well as all the parts required, then I'd get on with the project.