Ron61 You have it right. Bio has about 85% of the lubricates that diesel at the pumps has. Yes the sulfur is just like the lead in gas motors and helps lube the injectors and pump. It's also not a silly question. If Wayne get bio fuel hope he likes eating
It does smell like a beach party with french fries and fish.
.
Wayne Maybury Yanmar had alot of trouble about 5-8 years ago with there motors. Burnt pistons was the top issue. The European diesel was not the same as the US fuel. The injector pumps where causing a lean condition and melting pistons. Yanmar was sued many times. Not sure how it all turned out. I would check with Yanmar before changing diesel fuels. You may need to add a stablizer or booster to the mixture. In the old days Kerosene was added to thin the diesel and help clean the injectors. Good luck Rick L.