welcome to the club & nice to know you are enjoying it
what's the history ?
what happened to her @ 40K maintenance ?
which plugs you are using ?
Either you are pushing her very hard & kept the RPM about 4-5K all the time , because she is not suppose to give less than 10km/L in any given circumstances
anyway regardless of that get all the fluids drain & give her fresh blood , fuel filter(heart) is must to replaced & bring her log book to zero
I recon she is with out CNG