Hey all, I have a three year old Ford Fiesta 1.4TDCI with around 12000km on the clock. Recently we are getting really bad fuel economy - around 7.4lt/100km!! Me and my wife are not the most economical drivers out there but even we could get an easy 5.5lt/100km before. What could be the cause of this?
Would a can of BG244 or Fort Advanced Diesel Treatment help?