on sat. 9/20 my wife and I got up at 3:00am to drive to a craft fair. It was 33F overnight and about a mile from home with 100% biodiesel in the tank the engine died. We pushed it to a gas station and spent the next 3 hours putting in 4 gal of diesel. 3 - 6oz bottles of store brand of diesel fuel anti-gel. Also about 10oz. of psdfs(power service diesel fuel supplement). I found that the best technique was to take out the c-ring that held the return line to the fuel filter. I have a vw jetta 2003. When I removed the hose there was definite vacuum. The filter was visually dry of fuel. I then poured in the store brand of anti-gel. The engine would then run at idle for about 5-10 minutes. After about doing this 5 times the engine just kept running. I hope I didn't damage the starter motor or the battery with excessive cranking. Also the fuel injector pump would make a squeaking sound when it was sucking hard.

Lesson learned.

I had previously found that my biodiesel is solid at 40deg F. Since the fuel filter clogging I have found it solid at 45 deg F. What kind of biodiesel gells at 45F or higher?