So, recently purchased Holden Cruze 2012 SRi-V JH Series II, 1.4L turbo petrol, second hand.
It's advertised to have a combined fuel economy of 6.9L/100km (34mpg)
However, it's currently running at 10L/100km
The car itself drives smooth (except when shifting gears - details will be in another thread), no misfiring (that I can hear), pinging, knocking, etc.
Wheels are pumped to the right pressure, brakes aren't dragging, I mostly do highway/freeway drives, which range from 70km/h to 100km/h (44mph to 60mph).
Been like that since the day I got it.
Any ideas what I can diagnose to see what could be causing it to eat so much fuel?