VW TDI owner and Boston resident, here. Typically, gas stations which sell Diesel fuel put in anti-gelling additives that vary with the time of year. In the 1

VW TDI owner and Boston resident, here. Typically, gas stations which sell Diesel fuel put in anti-gelling additives that vary with the time of year. In the 12 years I've owned my car, I've never had a problem with gelling fuel, even when it got down to -5° F. That being said, I'd have to lean on the glow plugs for 20-30 seconds at those temperatures, in order to get the engine block warm enough to turn over.