Cold weather biodiesel

Pork fat is solid at room temperature. You can heat it to 55°C (131°F), add methoxide and mix for an hour. You'll get biodiesel. Now, Ive never done this but since the fat was solid at room temperature, you can bet your shorts, the biodiesel will be solid at temperatures higher than 0°C (32°F). So only vegetable oil for winter.

Geting your car to run on biodiesel at low temperatures is an art. Some people mix it with petrodiesel, some people heat their fuel filter, others put in additives (by the way additives for petrodiesel - don't work all that well). The best thing to do is to forget biodiesel over the winter. I know you didn't want to hear that answer, but let's be realistic, nobody likes to get up at 5:00 in the morning, to find out the car won't start.

There are ways to get your biodiesel to staj liquid down to about -15°C (5°F) using just the stuff you already have in your garage, but I've not tested it to the point where I would be comfortable writing about it on this page. Give me a little time, to do some more research, and I'll post it here in the future (with pictures)!