Biodiesel would be a good step toward a cleaner environment but how much is it possible to produce? Same with SVO? It's not like we have a big excess of grains right now to produce a lot of oil with. Just a guess, but my guess is that the government doesn't pay much attention to biodiesel because at best it could only be a drop in the bucket of all the Diesel used. I'm not saying it's not a great idea to produce and use it because it is, just pointing out that there will never be enough of it available for everyone.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k