I must concur with the above post. Both my '76 300D and previously my '84 300TD run great on biodiesel. In fact I haven't found a diesel vehicle that DON'T like it. In older cars reguardless of what they are you MAY have trouble at first. The reason is because Methyl Esters will "super clean" your fuel system. ( read buy some extra fuel filters) I'm doing OK on a mix of biodiesel right now. Temps. are in the teens to twenties lately so I have been mixing it about 60/40 with premium"soydiesel" that I buy locally. The only time I had trouble was when I pushed the envelope a couple weeks ago, it looked like the weather was going to be in the high 30's to low40's for about 3 days so I filled up on 100% B.D.. Long story short, I got caught on the second day when we ended up getting down to 14°F at night and I had to add some pump fuel and a shot of "diesel service" 911. to get things liquid again!