most biodiesel is made to be blended at B5-B20. We feel we need to do certain things different as we are selling B99.9 which isn't the norm.
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1-We don't just meet ASTM spec for residual total glycerin, we are usually 50% below (.024 is ASTM spec, we target .012-.014)
2-We remove the residual soap to less than 150ppm.
There is no ASTM spec for this but we have found that fuel can pass the "cold soak filtration test" with as much as 500ppm. You can feel a slimy film on the filter with excessive soap.
Also, soy biodiesel will generally have less "cetane" (40-45) so less power than using WVO biodiesel (ours tested at an independent lab at 57.5).
Glad to hear you are producing AZBiodiesel to a better spec than the ASTM requirements. I think these numbers may explain why AZBiodiesel seems like such an amazing fuel. That's some insane cetane rating! According to Wikipedia, normal dinodiesel is only in the 42-45 range typical.
Your comments about glycerin and soap removal are encouraging. Do you have any comments about water removal and hygroscopy? One common theme I see on TDIClub.com is people claiming rust deposits in their fuel pumps/injectors can lead to premature engine failure. I've been storing my AZBiodiesel in yellow diesel containers inside my dry, air conditioned house. I'm hoping I will be safe from such demise.
I want to keep my 2001 VW TDI running as long as possible, as I hear the 2009+ TDI's aren't specified to run on high concentrations of biodiesel like my current car. My current car seems to run beautifully on all concentrations of AZBiodiesel I've tried so far (est. up to B80 so far). Now that we're in the hottest summer months, I'm tempted to try B99 since its running so nice and you've lowered the price to $2.59/gal. That's lower than any fuel I can buy elsewhere at the moment!
