grease car valves and fuel pressure question?
 

I have been running wvo with a grease car kit for a few years now and it has always seemed that when running high rpm or pulling heavy that some diesel slips by their valves. After a trip Sunday when I should of been burning free wvo pullin my camper instead I burned 7gal. diesel. My filte was changed recently. I have read that cali powerstrokes, mine is a 97, can run up to 100psi fuel pressure. Is this correct? the valves from greasecar are only rated to 75psi, so I guess that would make sense. Does anyone know of a better 12v. solenoid type valve for wvo. Help!!!! I have burning diesel.:-banghead