[PapaBear3625]

I’m going to guess they really mean “biodiesel” (carbohydrate oil) rather than hydrocarbon diesel. The former should be easy to get an organism to secrete, the latter would be very hard.

[Wonder Warthog]

"I’m going to guess they really mean “biodiesel” (carbohydrate oil) rather than hydrocarbon diesel."

Nope. This is direct conversion to diesel. No de-esterification or further chemical processing needed.