Hi All,
Have owned my 07 GU 4.8 for about 7 years now and the economy has gone from around 21 lph around town to between 26-28lph. Car has now done 210000 kms.
Now there’s no engine lights coming up to indicate an AFM or O2 sensors are faulty, could they need replacing without engine lights? Also could the valves affect the poor economy?
Thanks for your input

Mick