trap oxidizer and vegie oil on 85 diesel coupe

[chinese food]

i've gotten the run around from mechanics on whether or not i can run veggie oil on my 85 mercedes cd300. it has a trap oxidizer (california car) which was updated by the dealer back in 97. some say running the vegie oil will destroy the oxidizer and i need to bypass it. others say i need some special pipe from the dealer. still others say i can use vegie but should mix it half and half with diesel. and if the thing screws up, to get the bypass done.

does anyone out there have experience with this car and this problem?

thanks!