Apparently the answer is more or less "yes." I'm a quarter of the way through my first tank full of B99, doing city driving -- gone about 120 miles. Older cars apparently have rubber seals and lines that degrade in biodiesel (which is highly solvent), but newer cars avoid most of these issues. Or so I'm told.

Pros of B99 are the pros of all biodiesel -- renewable resource, higher lubricity, mostly lower emissions, and so forth. A big factor around here is cost -- it's easily 10-15% cheaper than petro diesel.

One con is that the solvent properties of the bio fuel tend to break down buildup in the tank and lines. Lots of people clog their fuel filters when they make the switch. To be on the safe side, I'm carrying a spare spin-on fuel filter and a 3/4" wrench in the trunk right now.

So far I'm pretty doggone happy with the machine. I'll take a 500-mile trip this weekend and report back on fuel mileage, etc. Oh, and my new set of glowplugs should arrive in a day or two by FedEx.

Cheers, John