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Originally Posted by Jedgar

Am I overlooking something ?

Yes. First, there are several parts of your stock fuel system that do not like VO. Second, VO and diesel do not stay in solution very well. The VO can settle out and will rest on the bottom of the tank. Your factory fuel pick up is right on the bottom of the tank. This means that in the event VO settles, your engines first gulp will be straight VO that settled in the fuel filter, followed by more straight VO that is sucked off the bottom of your tank until you drive around a bit. Your truck will 'run just fine' during all of this, but poor combustion of the un-heated VO will lead to carbon build-up in the combustion chamber. (Biodiesel and VO stay in solution much better, btw!)

Now , back to the parts that don't like VO. The PSD fuel pump exposes the fuel to the inards of the pump motor. Among those inards is the copper windings, etc for the motor. Copper and VO don't get along, and a reaction called polymerization can take place rendering the pump useless and possibly plugging filters downstream. I'm not sure if its a coating or the material the fuel bowl is made from, but a reaction takes place in there that creates a 'scum' residue on the metal surfaces of the filter. Also, I have seen a failed FPR in a PSD fuel bowl that ran VO 'blends'. The inards were basically dissolved by the VO.

All that said, I have a PSD fuel pump in straight VO service for 55,000 miles and I know there have been lots of people claiming success doing exactly what you propose. I just worry that almost NONE of those people ever come back to tell their horror stories, or simply sell the POS to someone who may never know what happened.

I don't want to rain on your parade, but if you want to run VO safely, and still see the miles your PSD was intended for - I would continue to research and learn WHY sucessful designs are sucessful. I promise that I am WAAAAY ahead money-wise, even after a significant investment in a conversion. AND, I can drive anywhere, in any climate, and still burn my 'cheap' fuel.

Good luck, and please keep us posted.