I am currently in the market for a VX with a sub tank. I am going to run off SVO and I figure the sub tank is set up perfectly for it already. I wanted to see if anyone else is doing it and what modifications they have had to do to run oil? I am planning on dropping the main tank to add a heater and use the sub as my diesel tank. I have not researched an out of tank in line heater. I am working with a friend to import one when I find it. I found a truck in Amsterdam but it is registered 10/93. It will take too long to sit and wait for it to become legal to import. I would be happy to find one here but yeah. Figured this is as good a place as any to start my research. I used to run all my cars and work trucks on my own biodiesel. It was a lot of work to make, and I did not like storing the methanol drums. I figured that running SVO will take just as much work, but will not involve the carport full of explosive gas and a reactor.