90 sdl.
Diesel tank holds pressure (whoose when opening cap...should it?)
Feed and return lines dry at tank.
Hard lines dry from tank to engine compartment.
Feed and return lines PLUGGED (to test and eliminate the engine side of leaks) at engine compartment.
Car run on wvo and the fuel level in stock diesel tank drops!
No smell of diesel.
Rear Front and Mid of car dry.
Is there a vent hose from that may be syphoning fuel out only when driven?
I am going nuts!

__________________
82 300D....went to MB heaven
90 350 SDL....excercising con rods

help help help

__________________
82 300D....went to MB heaven
90 350 SDL....excercising con rods

My only guess is that while you are running WVO you are actually running diesel as well, or at least a mix. This is because of the vacuum caused by pulling the oil through your fuel filter and other components. Likely it has failed, at least partially, and while your running WVO its seeping diesel in as well. What kind of valve(s) do you have?

That was my guess as well so I disconnected the diesel feed and return lines...still dropping diesel.
I just switched to 2 grease car 3 ports after Pollak 6 port failure (or was it since my diesel still keeps dropping)

__________________
82 300D....went to MB heaven
90 350 SDL....excercising con rods