Had 2005 golf 2.0 TDI and was consistently getting 6.0 litre to the 100k city driving. However lost this car in an accident and I replaced it with a similar 2nd hand model with then 80000 km. Have consistently reported to the dealer that it lacked power and had very poor fuel economy Had vehicle serviced @90000km after service EPC light came on due to air intake pipe being loose. no difference in performance and econ. @ 105000km service air mass meter was replaced no difference. @ 110000km erg valve replaced - no difference 300 km later engine check came on. Fix was "remove exhaust recir cooler and valve, found cooler partially blocked cleaned an reassembled. no difference. 120000km fuel filter was replaced and they suggested that it was the problem - no difference Have noticed the following. When I accelerate hard the engine blow black smoke until I stop accelerating, you are not thrust into the your seat at all on acceleration.