Winter and Biodiesel

What to do to make sure your vehicle starts and runs fine in cooler and cold temperatures.


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discussions of winterizing, additives, and other ideas at

General discussion of low-temp issues at

So what's the issue with biodiesel and cooler temperatures?

At temperatures below roughly 40 degrees F (4 deg C), most biodiesel will start to get cloudy, thick and eventually, at very cold temperatures, the consistency of wax. There are additives on the market that advertise lowering the CFPP (Cold-Filter Plugging Point), but we strongly recommend experimenting with any of these products to avoid problems. There are significant differences in CFPP for different qualities of biodiesel, depending on what type oil was used, virgin or used, soy, canola or lard ...

So what to do?

Probably the simplest solution in North Carolina is using a 50/50 blend of biodiesel and winterized petrodiesel.