Fuel for '81 w/'84 Engine/Trans---Is 20% Biodiesel OK?!?

[iladelf]

Howdy all,

I'm finding in my local area that, all of a sudden, I'm seeing badges on diesel pumps that say "This fuel contains up to 20% biodiesel product". Bad news is, I'm not seeing any pumps with just straight diesel. My question I'll pose to our general viewing public is this; am I ok in using this product with no modifications, WVO-wise, to my car? I'm wondering if I keep filling up with this, that I'll eventually damage lots of internals in my vehicle. For the record, I'm daily-driving an '81 300D with an '84's "innards" (engine/trans).

Looking forward to your posts; should be an interesting discussion, and helpful to all.