hi, im new to site and diy servicing so please excuse my lack of knowledge. i recently serviced my 2003 galaxy 1.9 tdi not done the oil and filter yet but replaced the air,cabin and fuel filter car seems to be running better but fuel consumption has gone down slightly not sure if i have done something wrong was expecting a slight increase(wishful thinking) getting between 34-35 mpg around town maybe this is ok not sure what i should be expecting but was slightly higher before. again excuse my dumbness thank you in advance for any replies.