City drive FC surprisingly not that different compared to my old Persona 1.6.

Doesn't look so bad for a car that people always call as a gas guzzler kuat telan minyak.

can using thinner oil than recommended cause engine be less efficient? usually i leave my engine oil selection to my mechanic, i don't remember which viscosity he use but he always use the cheapest option so i'm pretty sure he use 20w50 mineral. this time i change myself to 10w40, there seems to be a bit of increase in FC.

Could heavier wheels cause higher fuel consumption? Recently replaced the taiwan sport rim to stock proton sport rim. The stock sport rim is dang heavy.

are you using stock proton sport rim or aftermarket? just found out that heavier sport rim can cause higher fuel consumption. in my case it's about 10% increase.

Is the fuel consumption liter/100km in the car meter can be trusted? Some says it is not accurate, some say the car ECU should give the most accurate reading because it monitors the amount of fuel the engine use all the time. Which method do you think the best?

My Persona FC used to fluctuates a lot, sometimes 7.9L/100km, sometimes 8.8L/100Km. This year I decided to mess around with the MAP sensor, change air filter and clean throttle body, use heavier stock sport rim, and 10w40 oil instead of mineral 20w50, now the meter is constant at 8.7L/100km (about 10% more fuel consumption). However the mileage per liter doesn't feel changed because 11 liter of Ron95 still give me the same mileage as before.

Got manual calculation result today, turns out to be around 8L/100km while the fuel consumption showed by the meter lowered by 0.1L now at 8.6L/100Km. Persona 2007 1.6 Auto, city drive average speed at 60km/h.

The meter have a known issue, always to trigger check engine light whenever going faster than 110km/h or revving past 3000RPM.

are you using the same tire and rim size as per the car specification? i'm thinking that maybe my inaccurate meter readings was caused by using a slightly smaller tire size. should use 195/60/15, but currently i use 195/55/15

didn't notice any misfiring or lost of power. it's a common issue in persona/gen2. would love to get an obd code reader to confirm it but the code reader thing is confusing.

what car?