As usual, those who don't use something attempt to denigrate it. Biodiesel produces far less soot that dyno diesel meaning longer intervals between oil changes. My lab tested the oil from my 1985 300td Wagon at 5k miles and found that it contained less particulate matter than when I tested it with dyno diesel at 3k miles. Combine this with synthetic motor oil and I normally go 8k between oil changes. I have more than 100,000 miles on my engine using this combination over 3 years with no oil consumption and no problems.

Don't judge if you don't know.