Watch your ambient temps, if it's too cool out (visosity is up) your cold starts may be "grumpy." This is when you willl most likely have incomplete detonation related to poor atomization and low cyinder temps. Which can lead to coking and gumming of rings.

There were some incomplete tests run in Germany on a fuel called Tessol NADI II. Which is a mixture of 65% vegetal oil, 30% Bio-Diesel and 5% ethanol.

Your 50/50 blend will have good cetane value but can tend to be a little thick.

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