RCash said:
... Properly processed B100 should have no gelling issues greater than petro diesel...
Bob,
I'm confused by that statement. Either I'm misunderstanding it or your experience with biodiesel is different that most! From my experience and research it is generally accepted that B100 has a much higher cloud and gel point than petro diesel, even summer petro. Different feed stock produces different results, however, so maybe you're basing this on a specific oil, but it would be unique. I can put a 8 ounces of canola-oil based B100 which has passed several of the ASTM tests for biodiesel (water, catalyst, methanol, mono, di, tri, and total glycerides, acid, and suspended solids) in the freezer with 8 ounces of summer petro diesel and the former will be solid at say 15 degrees but the petrol diesel won't get to firm slush until its below 0. So can you clarify?
But on the subject of testing bio-D for gel points and use of additives, I, too have done this. I've been using a biodiesel anti-gelling additive for B20 produced by Amalgamated, Inc. in Indiana. I've been using it lately at 3 times the recommended dosage in a B65 blend with winter petro diesel. It helps, but not by a lot.
But from my tests what I've learned is that experiments with addtives and blend ratios will help you get a feel for what blends and additives work and don't work and how they compare to each other, but they don't give you a definitive answer as to what temperatures you're fuel will give you problems. Rather, only a rough guideline. Recently we've experienced temps in 12 to 14 degree range at night. I am currently running the mix referenced above - B65 with winter petro diesel and 3X dosage of anti-gel. My truck sits outside at night under a canopy with the block heater plugged in, which comes on with a timer at 3:00 am. Next to the truck is a jar with about 10 oz. of my fuel. At 6:00 am when I leave for work, the fuel in the jar is thick and very cloudy with clumps of wax. However, the truck starts fine and gets me to work across town without problems.
In November we had a cold spell where again the temps dropped to 12 to 14 degrees at night. At that time my fuel was B65 mixed with summer petro diesel and NO additive. My test jar was
solid when I got ready to go to work. Yet the truck started and got me to work without issues. Surprised the begeebers out of me! The tank was kept nearly full, however, so I think the shear quantity of fuel helped to keep it from solidifying. But I would think the fuel lines would have been clogged. Yet it started and ran!
So, use your tests as guidlelines, but they won't necessarily indicate how or whether your truck will run at specific temps.
FWIW,
-Jay