VW
⚠️ Declining MPG? Keep an eye on your engine temperature as a faulty thermostat could be the culprit
⚠️ Declining MPG? Engine running cold? Keep an eye on your engine temperatures as a faulty thermostat can be the culprit! Here we have a VW Passat (2004 – 203,029 miles) booked in for diagnostics and Engine Carbon Clean after the fuel economy was dropping. 📊 Diagnostics confirmed cold running