I think it may be too early to get a correct assessment.

Plus minus 10% is about 7L of fuel. Quite alot actually. The FC will usually balance up after the 3,000km mark. Some cars may be earlier.

RPM for 110 is around 2000 and 160 is below 4000 rpm.

I dont think there is a standard formula for RPM. My Vios does 2500 RPM at 110 and 4000RPM at 160. I  think it depends on the torque curve.

Speed and rpm depends a lot on the gearbox ratios and also the final drive ratios, only worth comparing between exact same models and not between makes

160 km will be closing in on red line because it needs max horsepower to reach the speed .

Gear ratio are different between cars so RPMs will be different at the same speed. Your

Simple example 5:1 ratio against 2:1, both produce same 1 rev but the 5:q1 ratio needs 5 turns before it makes 1 turn

So all cars have different ratio between makes hence no sense to compare between

Lockup doesn't mean it bypass ratios to 1:1, it means the torque converter is locked solid to the engine. The torque converter has no ratios inside it

dude the torque converter doesn't spin on it's own like a slipping clutch lah, the rpms of the engine will spin the gearbox at the same rpms also, otherwise all auto cars will have the rubberband effect where the engine revs before the car moves, i've never ever driven a conventional auto that has or even able to do that.

Got me all excited. Haha.

One example is the legendary honda b series (not all) have managed to touch 100hp to 1lt ratio. But definitely we wont be gettin the gdi versions any time soon.

Guess turbo is way forward. Most contis hav embraced this approach already. Japs n the rest are kinda slow. Most hybrids lack tt punch. Wait n see again. Civic or accord turbo?

Well, don't be surprise on the 6th serivice (60K) gonna cost you RM1.5K just for parts replace. I doubt how much the labour for this job.
K5 maintenace

er....when japanese dominate rally and circuit race, they are using turbo wor.

like s13,s14,s15 and skyline, RX7, evo, impreza STI.

like 20 years ago?

U too planning to change? What about the Forte?

HAHA! Good one! In the process, pls find buyer for my Vios yea? 40K

pm me some details of ur vios.. my fren looking for 2nd hand vios..

and yea.. the hill start thingy only last for 10 sec and it will roll backwards? not until the driver press the acceleration pedal?? sounds stupid leh..

Gregy, I beg to differ. This is how I've tested it - I had the car stopped right before the hill top (45 degree incline). The brakes was floored completely. Next, I slowly removed my foot from the brakes and the car just remained immobilized. I can't really recall but it was definitely more than 2 sec.

Perhaps, someone can volunteer to time it out when they take the Optima out for a spin? 

Much appreciated 

Guys, i managed to get a 2nd test drive today. Im more impressed now. Here is my take on the car:

Acceleration & pickup

I had 4 adults in the car including the salesman. Managed to get a straight clear road and floored the pedal. The acceleration was sluggish for the first 2 secs and then the power kicked in. I must say its very much comparable to the Teana with its Xtronic unlike what i mentioned earlier. The engine has got a certain vroom to it more like a rumbling tiger when the RPM passes the 2000 mark. Some might love it but i think it didnt sound too refined for my taste. The Teana and Camry were a tad more refined. But the power was there and the pickup was really impressive despite its heavier weight. I would think the harshness of the engine will improve over time since i was the 1st to test this car when it arrived yesterday.

Handling & Road Grip

I chose a deserted roundabout and did about 7 rounds at about 80kmph with the full load of passengers. I must say i am quite impressed with its cornering ability and road grip. There was only marginal body roll (much better than the Camry at lower speeds). The 18 inch tyres and probably traction control really kept the car stable. Not sure if 80kmph was fast enough for a roundabout but its certainly the fastest ive been on one. Its a small roundabout so turns would have been sharper.

Brakes

The brakes are quite good and stopping power was quite evident. I even tried cornering braking while taking the roundabout and the stopping power was really good. I hit about 110kmph before i came up to a traffic light and slammed the brakes (not enough to engage the ABS though). It surely has a confident feel.

NVH & Wind Noise

As mentioned earlier, i hit 110kmph and tried different scenarios with the sunroof just to gauge the NVH of the sunroof. I tried with the ceiling panel open but with the glass closed and also with both closed. The effect was the same. Virtually no wind noise even at high speeds. Not sure if it will hold up at around 140-150kmph though. Didnt feel any windo noise coming from the doors or windows as well which mean the door seals are quite good. Hope they last though. But during hard acceleration, the engine could be heard and it does sound a bit harsh. But once you reach cruising speed, the engine is virtually silent.

The whole test drive lasted about 1 hour (longest ive been). I must say im more impressed now. Im almost certain to get the Optima K5 now. Have started asking around to get the best deals. Best i got so far was a RM700 rebate.

1) The car that i used was in fact the display car at the branch. Its still there today (i checked). Their actual delivery units are at the store at the back. They have 6 due for delivery.

2) I had already told the salesman that im looking for the best discounts. This guy is now trying to get me a higher trade in value for my own car in lieu of a discount.

Trust that clarifies. And pls dont call me a prick.

i'm very much interested with the new K5 as i'm looking for my 2nd car. few options including K5. went to KIA showroom in glenmarie shah alam today to see it.

was amazed by the size of the boot! its huge!
then there was it. nothing else impressed me.
the built can be say slightly lower than japs, but with 5 yr warranty i dont think u need to worry much.
but the dashboard / fascia plastic is not up to my expectation.
the door are not as solid as japs, IMHO, no nice 'tummbb' sound and felt light
the leather inside was not impressive, stitching and quality
somehow i dont see myself driving this car in the future so i ended up my visit in only 15 mins
by the way, the sales person said they are doing a customer day next weekend, so u can test drive car, including K5.

Sounds good enuf to me. I think its marginally better compared to the JBL on the Peugeot 508.

But damn, the car looks good. Sometimes I just feel like taking it out to a park and stare at it for a while.