QUOTE(Ang3237 @ Apr 7 2021, 02:23 PM)
After lurking around in FB Proton Persona/Gen2 group for few months, I can say there's some truth to this but, it was mostly caused by underlying engine issues plus driving style. And then you also need to consider what is 'bad fuel economy'. Many malaysians consider myvi as good fuel economy car, but then try to compare it with proton car with bigger engine and heavier chassis.
As the original campro 1.6 engine user in a Persona, I'd say it got pretty good fuel economy given the car size. Before this I got 8.2L/100km for city drive, but after fixing the knock sensor issue with the engine, now it's down to 7.2L/100km city drive and 6.8L/100km on highway, only 0.2 difference from the original manufacturer claim fuel consumption in the owner's manual (6.6L/100km cruising at 90km/h).
And if you look at average myvi fuel consumption on fuelly website, it seems that even the myvi averages around 7L/100km. So it's safe to say that the generalization that Proton = bad fuel economy is far from truth. In the end, it all depends on your driving style.