the new CKD already in TC warehouse. seen the spyshots 2 months back.

the engine sound is abit rough, on ECO mode it should be subdued. but this engine is not suitable for the ECO setup... because this engine is not a low rev engine... Max Torque at 4400RPM... hence limiting to 2000rpm means the car only uses half of it's torque most of the time.

the should use an engine tuned with lower max torque rpm... something like 3600rpm so that we will use 75% of torque most of the time.

i find it loud when in sport mode... but if you say it's loud at low rpm, you need to compare it with other serena...

but i feel the engine sounds "dry".... maybe the engine is still new, or perhaps lower vicosity oil used by TC...

but i used tuffoil and it does reduce the noise.

on full city and jam, my lowest is 9.3km/l.... usually 10-11.7km/l..

i think the problem is driving style.
1. i switch off rear aircond if there are no rear passengers.
2. aircond is set between 23-24C
3. aircond blower set at 2 bars
4. use tuffoil additive
5. switch off eco when going uphill or driving out of toll booth.
item 1-3 is to reduce the electrical load so that you can idle longer. total idle time driving from cheras to klcc is around 10-15 minutes for the 45 minutes drive.

this car save fuel by
1. ECO mode - reduce drastic acceleration to reduce fuel consumption.
2. idle stop - reduce fuel consumption when car is not moving
3. s-hybrid - provide 1s electric motor assist during liftoff.
4. s-hybrid - fully switch off fuel injection and charges battery when you lift off throttle when slowing down

so you need to work together with the car's parameters to save fuel... check my lowest FC on highway.... ECO mode really does dampen the throttle movement in return gives better FC.

a little diy..


final result


closeup..