[da bomb]

You can run older diesel vehicles on SVO or Straight Vegetable Oil, most people usually run a mix of 40% diesel to 60% vegetable oil (Oil Seed Rape is the best as it doesnt cloud at low temperatures).
The government got sick of trying to keep up with the administration of loads of 4x4 enthusiasts requesting excise paperwork (C&E Form 103) so they could run on Bio SVO and then pay the reduced rate of Bio fuel tax per litre on the SVO they used.
So Customs and Excise made it legal to use SVO up to a quantity of 2500 litres a year for each individual vehicle.

You can run on straight SVO, on smaller engined cars there is a problem with lift pumps being able to handle the viscosity, but a Cummins donk wouldnt think twice about it.

Another way of ensuring the viscosity is kept "Runny" is to add between 2 and 5% white spirit to the SVO and let sit for a week, it breaks the chains within the vegetable oil and makes it more useable in colder weather, the only downside is white spirit isnt exempt from fuel tax, but who's gonna know!!

Apparently the cheapest method of purchase is via a Vegetable oil distributor in 1000 Litre containers, although on the Mitsubishi shogun forum i am also on, people buy cheap 1 litre bottles on offer and bung it straight in their motor!.

For those who are thinking "Thats going to bugger the engine" some owners have been running their vehicles for over 2 years doing high mileages solely on SVO and report a slight increase in performance (better Cetane values in SVO) quieter running, with no fouling problems. Some of these owners are using their vehicles under heavy towing loads etc.

For military vehicles designed to run multifuel i shouldnt think SVO would be of any concern at all.

The exhaust emissions are better as there is no mineral content in the fumes, just smells like you are cooking!