VW Jetta TDI

2010 Volkswagen Jetta TDI Cup Edition: Cold Weather Start [w/video]

The 2.0-liter turbo diesel in our long-term 2010 Volkswagen Jetta TDI Cup Edition is a very modern mill, so we were curious how it would handle starting in the frigid clime of northeastern Ohio this time of year. Diesel engines typically have three vulnerabilities when it comes to cold weather starts: the fuel, the battery and their glow plugs. First, the new Ultra Low Sulfur diesel fuel we all use begins to gel at a higher temperature than the old fuel. Sulfur is also a lubricant, and with less of it, the fuel pump has to work harder in cold temperatures to keep the thicker diesel ... Read More