Problematic properties of bio diesel
 

I'm seeking for an overall summarization of disadvantages of bio diesel.
So far I found:
- Bio is getting into the engine oil because of incomplete combustion, causing a chemical reaction called Polymerisation
- engine failure due to oil sludge
- stuck piston rings caused by the high amount of phosphor, calcium and magnesium
- low cetane number causing bad cold start abilities
- viscosity of bio is 20 times higher than diesel causing failure in injectors and pump systems(burn up)
- water in fuel, bio has hygroskopic abilities (attracts water)
- lower efficiency due to 12% lower BTU this results in 5 to 10% power loss

These results were released by the Deutz AG, natural fuel division in November 2007

So if this is a damper in the bio world- tell me what can be done to avoid the disadvantages?
:humm:

The biggest problem with using bio in older vehicles is compatibility with the rubber seals, gaskets and o-rings in various parts of the fuel systems.

yupp, they mentioned that in sub point(recommandation of yearly rubber hose change)
They clearly made the ranking list of problems like above. Dirt and fuel system related probs are like lower ranks???

As Ususal, It Depends
 

The engine and fuel system in question has a bearing. Depending on the specific circumstances, losing the lift pump in certain ways on the early to mid-90's Dodge Cummins platforms could lead to catastrophic, expensive consequences. The late 90's-early 2000s VP-pumped 24vs were also fuel supply-critical in terms of bad things that happen to expensive parts under inadequate fuel supply conditions.

This is known in some of the 6.4l powerstrokes, and have caused this to be concern. Manufacturers that inject fuel in the exhaust stroke for the DPF system. Will have issues of diesel fuel and or biofuel in the oil. More so, with the Bio. It is known, but rare with older vehicles.
Sounds like Straight vegetable oil. Never really seen Bio do this, I have seen it cause other nasty problems.
I have seen this with Straight Vegetable oil as the fuel.
In the cold months, yes. I have only used my bio in the summer and fall months.
For older vehicles, it replaces the viscosity lost in the new dryer fuel.
And IT does! I have the pics to prove it!
I will get back to you on the numbers. From a different source if I can find them.

Tytrait your oil many times right before the process begins. Educate yourself on the best bio process you can afford. Test your Bio before you put it in your truck. Drying process and and good storage practices is a must! Proper mixing of the fuel needs to be looked into. don't just pump it into the truck and expect it to splash mix, this is what has caused me my major headache the most. mix your fuels before pumping it into the truck!
Make sure your truck can handle B-20 or less. My powerstroke loves B-50, but the rubber and plastics disintegrate in it above b-20, but then again I had a horrible fuel drying process and I splash mixed the fuel. I have the bill and pics to prove it.
It has to do with your process of making fuel. Bad biofuel kills, good fuel with improper mixing kills, etc.

These are the fuel standards Deutz refers to:

DIN EN 14214 (FAME),
and
ASTM D 6751-07a

I recently just tried my first homebrew batch of biodiesel with new cooking oil, the washing process was a nightmare without the right equipment, and I mixed it 10% with petrodiesel, I didnt notice any difference in drivability although it really cleaned up the black smoke at WOT which is awesome. my last batch I washed four times but had trouble getting the water out. I want to continue but no job and no fun tickets doesnt help my situation, i have found that when you first start making bio on a shoestring budget its not cheap but in the long run when I figure out titration, get an oil supplier, finish my processor I beleive it will save me some money. TO HELL WITH FOREIGN OIL!!!!

So forgetting your time to make it. What will your cost per gallon be?

Depends on your Titration levels of the oil being used, the higher the level, the more chemicals it's going to take to get it where it needs to be.

Without my time to filter my WVO, all I pay for is a small amount of electricity (so small I can't really account for it on my bill), then burn it straight!

In fact, I'm taking oil that is too high in FFA's for bio users and burning it easily.