Hi
i actually know a fair bit about bio diesel as my husband works for haulage firms and used to make it.
the first thing to consider is whether the car is under any warranty. if so you need to check with whoever provides that cover. if as above it says don't do it, then don't.
if it's not, and you want to give it a go there are a few points you need to consider.
the bio diesel will clean any crap out of your fuel system, so your filter will need changing regularly to start with. also any rubber fuel pipes need changing for silicon otherwise it eats away at them and you'll end up with half your tank of cheaper fuel ****ing out of a return pipe as you drive along.
lots of people say it gives higher mpg, the company did find that and ran their new iveco fleet happily on it. (til the director bought himself a house, bankrupted business and left us all to starve meaning insolvency practitioners sold off the trucks and equipment), but i digress.
you need to buy it from someone reputable and check how they process it, what percentage of unprocessed oil they add etc. 'wet' processing with chemicals makes the cleanest diesel and especially as a first time use in your engine don't go for any more than 10% unreacted.
the diesel at the pump is now about 5-10% bio now mixed in as some government target bollocks says so. some use more.
i guess the only thing to do is look at your options and weigh them up.
List of Biodiesel Suppliers - PetrolPrices.com
this is a list of bio fuel companies, i'd use one of these rather than someone using dubious equipment in their garden shed
hope this helps a bit
sarah
