

In the same way biofuels are: Technically yes, but still not that great of an idea outside special applications. (One I could imagine would be someone wanting to live completely off grid using filtered frying oil in an old-but-ridiculously-sturdy diesel generator)
That’s an issue that can come up, when your inside guy for market manipulation with all the power necessary for the scheme is also an impulsive narcissist, who never was that bright to begin with, but is also clearly losing some mental faculties due to age, too.