One-dollar-ninety-nine cents? Yikes! And I thought we had it bad in California. The current price in my rural area is $1.67. Anyway, I have run my 300D on straight ATF in an emergency, and had no performance problems. In fact, it was quieter and smoother. If you are really commited, surf the 'net for the keywords "biodiesel" and "veggie van" There are grassroots companies selling do it yourself home biodiesel stills.
Reagrds - Luke