You have to look into overall bro. It's best if you check your MZD fuel consumption data analyze. Look at the picture which I've took. The avg FC is hard for you to judge.

Basically, you need to know how you want to control your speed on the highway. Well, basically in city, you can hardly control due to the jam. Your speed have to be constant in order m3 system to show you the accurate display. If you 10 mins step 90 kph then the next 110 kph, then next 50kph, and so on, how can m3 system show you an accurate display, if you get what i mean. It's best if you observe the current FC instead of the average. For my guess, m3 system will take 90kph + 110 kph + 50kph + so on / the time running = average FC.
So far, if at constant speed, yes, i find it 80% accurate. The other 20% base on approximity / roughly (example, m3 shows 780km and u can roughly estimate 750km @ 90kph.)

Here are the pictures of the km I've been travelling from Damansara to Penang with just 1 fuel tank.

Above is the full tank before i travel to Penang. Notice that is already running 24.1km.

Above is the M3 system on economy Fuel consumption menu. Driving on 90 kph @ 4.6 ltr/ 100km

Above driving on 90kph after more than an hour @ 4.5 ltr/ 100km

Above driving on 110kph going back to Damansara.

Above driving on 110kph reaching Damansara.

Above is the total km which i m about to refill

Above refilled. The km updated shows 797km which I'm able to drive at 110kph constantly.

Above is the price I've pump. 34.41 liter @ RM67.10 - RM1.95 per liter
Note that M3 is a 51 liter car. That gives me remaining of 16.59 liter.
Hope this give an overall that m3 is a fuel saving car depends on the speed you are going. Above is 90kph and 110kph day trip.

Well, enjoy your ride with M3 guys. =)

I am M3 GL owner. The 1st day I got my car then found out fog get into my front light and today found out the rear light have same problem too.

I went to service center to make report already and wait for their reply now.

feel Sad and unlucky.

Anyone knows which sc can go to replace the lower arm bush? Whats the waiting period like?

Service centre told me to change strut bearing (instead of lower arm bush) as this service bulletin has been announced for Mazda 3, CX5 and (if i didn't hear wrongly what the advisor said) the Mazda 6. For me, they just tell me to fix a date.  So i presume they have all the parts they need. I'm on JB side though.

Have you got yours replaced yet? Do you still hear that annoying sound after change?

Recently the sound is becoming more noticeable every time after rain. Feels like inside an old saga cab. 

Anyone had their foggy headlamp solve by any mazda sc? My headlamp is perfectly clear without switching on the lights but after switch on the lights the fogs are very obvious and even cannot remove by using any polish agent.

Feel sad everytime look from the outside after switching on the lights

I scheduled mine to get it done on new year day as they don't accept such non scheduled works on weekends and I don't have leave other than that day. I'll drop a note here when it's done.

If you look at the past postings, there were some people that reported some got their bushes changed and it fixed their problem; some just reported that tightening the nuts and bolts solved them; others say the service centre put the bump stop and it settled theirs; mine say change strut bearing. So as of to date got 4 methods in dealing with the noisy suspension    Hard to say how easy/difficult to fix your noisy suspension...

But definitely not a good impression on the CKD Mazda 3 here despite it really is a good drive. On the side note, my mum's CBU batch W205 C Class came with a weird fuel injection noise not too long after driving it out from the showroom. So even la...because even premium brand also suffer some problems in the early days 

Raining day on last Sunday, my car suddenly have "ngek ngek" sound from suspension when passing thru bumps. But after dry, no more sound. If this is relate to those issue you guys discussed?

The "kruk kruk" sound when going bumps has been solved since first 1k km service. Now this "ngek ngek" is another fault...haih.

Hi guys , i have few question regarding our mazda 3

1) Can our mazda 3 play dvd on the screen? I saw my friends new cx5 able to play dvd

2) If i want to adjust the wheel camber , do i need to add on camber screw in order to adjust it?

3) Any 1 here has replace battery before? I saw online there is people selling RM 600 for original mazda GS battery. It wrote there if don't use original battery i-stop will never function. Is that true? Any one here using other brand battery ?

Raining day on last Sunday, my car suddenly have "ngek ngek" sound from suspension when passing thru bumps. But after dry, no more sound. If this is relate to those issue you guys discussed?

The "kruk kruk" sound when going bumps has been solved since first 1k km service. Now this "ngek ngek" is another fault...haih.

Anyone had their foggy headlamp solve by any mazda sc? My headlamp is perfectly clear without switching on the lights but after switch on the lights the fogs are very obvious and even cannot remove by using any polish agent.

Feel sad everytime look from the outside after switching on the lights

May I know what did the SC change to resolve Krug Krug sound ?

Raining day on last Sunday, my car suddenly have "ngek ngek" sound from suspension when passing thru bumps. But after dry, no more sound. If this is relate to those issue you guys discussed?

The "kruk kruk" sound when going bumps has been solved since first 1k km service. Now this "ngek ngek" is another fault...haih.