Flynn wrote:
Why are you always being so negative? I can turn a blind eye to it for a couple of posts but it does start to grate after the umpteenth time! Who gives a crap whether it is up for review or not, even if they make it legal they'll never know whether or not you are using bio. Why do you keep repeating 2500 litres? Yes, we get it already, thank you. Only an idiot would buy a new car, an even bigger idiot would do something to void the warranty. I am not saying you should run 100% veg. So what if you have to change your fuel filter? It costs what, £5? Is that such a price to pay for being able use several different types of fuel? You just haven't realised the potential and implications of being able to run on veggie.
They'll know quite easily. My van was stopped and checked by a multi-agency team down London...they not only took, and tested, a sample of fuel they also checked I was who I said I was...and that I was not drawing benefit...and that the van was insured/taxed/mot'ed...all in 5 minutes. They were looking for illegal fuel...as in red diesel (and you cannot remove the dyes...there is a chemical marker as well as the colour)....they also can look for other fuel....something called a liquid chromatograhy thing...very cunning...if my van had been running on the red diesel it would have been seized at that point....several already had been....so don't say they can't...they can.
As for the benefits of running on various fuels...hey...I'VE BEEN RUNNING ON VEGETABLE OIL FOR YEARS...LONG BEFORE YOU HAD EVEN HEARD OF IT....
It's all down to the viscosity of the fuel/oil...and down to its CLEANLINESS.
Manufactured biodiesel made in the home is not as clean as diesel from the pumps....quite apart from the need for filtering to motor fuel standards...there is also a need to ensure that the byproducts are adequately removed...things such as methanol/sodium hydroxide and water...and the parts of the oils you will not need...such as glycerin and other rubbish.
As for viscosity....the system runs on high pressure....but regulated high pressure...the injectors (mechanical) have a set size for the hole....with a set pressure and a set size orifice you get a reduced amount of fuel injected when the fuel is thicker. The injection system (common rail/electronic) runs at the same set pressure....and unless the electronics are aware/made-aware of the variation in viscosity then they too will inject less fuel than needed. The engine runs "weak", or "rich".