I sincerely doubt that any engine manufacturer is going to warranty their engine to run WVO. You say there are no issues with running WVO, this could not be further from the truth.
While it can be done and many do use it, there are some pretty significant modifications to the fuel system for a WVO system to run properly for many thousands of miles.
Homebrewers are very scrupulous about biodiesel quality. I know I am. IF they aren't then they're going to get a very expensive education in fuel quality.
The same thing goes for veggie oil conversions. As you are no doubt aware, F350_6, you can't just dump some veggie oil in the tank and hope for the best. Sure, it can be done in an emergency, but it's not recommended.
Plus, what about all the glycerin, free fatty acids and particulates that pass through the filtration media? I for one didn't want that stuff going through a set of injectors and injector pump no matter how 'tolerant' my old 6.9 is.
Consider this as well: when someone is getting started in WVO or biodiesel they are all excited to make a fuel that is so inexpensive and green than the fuels bought at the pump. Due to this excitement, people rush things, make poor decisions and otherwise don't keep track of what they are doing when starting out on biodiesel. Consequently, the fuel they put in there leads to engine problems. 99% of diesel problems can be related to fuel or fuel quality whether WVO or biodiesel.
When I show people how to make biodiesel, I tell them you only get out of it what you put into it. If you don't take the time to do things 'by the book' as it were, you're going to have inconsistent and often very poor results.
The illustration I like to use is when you bake a cake, you make sure that for the cake to be nice and tasty, you follow the recipe to the letter. Making biodiesel is no different.
Sadly, commericial suppliers cannot or do not meet the quality standards set either because they get rushed sending out the next 25,000 gallon tanker car or they scrimp on quality to improve their profit margins. There is going to be a period of turbulence in the biodiesel industry for a while for the commercial supplier. Over time, the high quality companies will prevail and those who are shoddy or lax in their quality control will be out of business.
And while biodiesel is a well-verified and studied fuel, until biodiesel quality standards are met, OEMs are not going to warranty their engines to burn the stuff above B5. I think John Deere is far more progressive in this aspect, and I seem to remember them approving at least B20 in a past issue of Diesel Progress.
In conclusion, there is actually too much information about biodiesel and WVO usage. However, the one site that I do recommend to everyone interested in biodiesel is
http://www.biodieselcommunity.org. There, you will find concise and very accurate first-hand accounts and instructions about biodiesel. Its manufacture, usage and safety are all listed there.
