Very good quetion and I would like to know the answer also.

I have heard the tail pipe emmisions are better, what better means I dont know, I am more interested the the free/cheaper fuel, and an alternative to dino, it will happen someday, I just don't want to be there when we are all forced to switch, try and be ahead of the game so to speak.

Diesel Rod

 

I googled several local stations that supposedly serve up B20 biodiesel. Went to one of them (a BP station) and asked the clerk if they sold biodiesel. He said "Yes, but when this batch runs out there wont be any more." Just when B20 would have been cheaper than dinodiesel, they switch back to the now more expensive stuff. Theres another BP station in next town over that I'll check next time I'm over there.

Steve

 

Check this link for a place near you.

http://www.biodiesel.org/buyingbiodi...s/default.shtm

Diesel Rod

 

That's the site I found thru Google. I suspect all BP stations will soon carry only the now more $ dinodiesel.

Steve

 

having done a fair amount of reading on the chemistry involved in biodiesel, i think you are making an error in talking about glycerin in vegetable oil. There is no free glycerin or glycerol in the oil. Oils are triglycerides consisting of three long chain fatty acids bound to one glycerin molecule. When making biodiesel, the fatty acid chains are released from the glycerin and the glycerin is discarded along with the unreacted hydroxide and alcohols. Straight vegetable oil and waste vegetable oil when filtered and heated should burn the same as diesel. I would be concerned about carefully filtering waste oil if burned straight. If converted and washed it's a better fuel than dino diesel. If heated to the vapor point of the alcohol used in the process for 20 minutes in an open container (no open flames) any residual alcohols will be boiled off and it should be very close to ASTM standards for biodiesel.

 

WVO tends to get more acid the longer the oil has been used. When converting to biodiesel the acidity is neutralized by the lye in the reaction and the fuel should be at a neutral pH when properly converted. If the fuel is highly acidic and heated it will corrode the steel rings and other metal parts. I really believe that WVO should be converted before using. If you use SVO it is much less acid and can be run without neutralizing, but it is important to clear the fuel system and injectors at the end of a trip. When making up your fuel you should use pH paper, not litmus paper or invest in a pH meter. A good meter can be had for under $100. Washing the biodiesel also removes all of the water soluble acid and impurities, as well as any water soluble foodstuffs from the fryer use. Commercial biodiesel processors may also distill off and recover the unreacted alcohols.

 

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Just wanted to update you on my vegoil truck. I now have 278k on the truck. For the last 58K I have been running on waste vegetable oil. I have not had a single problem related to the vegetable oil.