Have you considered that if you are advocating simply running the vehicle on vegetable oil, without registering such supplies to the DoE or the VAT man, then you are actually advocating a criminal offence.
Any fuel, even if you used water, has to be registered and Government has to tax the nuts out of it first, then you can use it.
I dare say this is why the post was removed as it may have been unclear as to whether you advocated the legal use or the illegal use of vegetable oil..even though you may not have meant anything illegal..
The site would be legally liable for any such information posted and the owners could be prosecuted as they are UK based.
Might I suggest a post on the subject that clearly advocates only the LEGAL vegetable oil..