v.r.sexy6 said:try running 3/4 tank with a bottle of NF cleaner.
Next fill up use a bottle NF boost and monitor from there.
Andy1GP said:The magic question to answer is what was your previous 320d? The E46 diesels are both more economical than the E90 counterparts.
DieselFan said:6 is incredibly high for open road and a manual 6 speed. I was getting 3.8 on my 330d at 100kmph cruising speed. 120 around 4.5.