Kia K5

[teomingern]

Thanks for your patience teomingern, on explaining.

I will try to follow your advice. Let me see if I can achieve that 12 Km/l FC. 

 

To be frank, i cannot be with that kind of patience, like you.   Kudos.

 

Haha... frankly, I was like you... I used to struggle to clock 10 km/L on my Impreza... until the last three months of it's life, I relax in my driving style and I was able to clock 12 km/L too. It's hard to relax lar.... I used to be the type that like to catch up with the car in front, close the gap, and enter curves at max speed, brake and then charge out... but the fuel consumption was abysmal... really bad... I was clocking 9.5 km/L to 10.4 km/L on my new Sonata (after the 1K servicing), and it was costing a lot... relaxing the driving style is the way forward... also, there are a lot of speed cameras these days... not worth getting caught lar... of course having spend almost 20 years driving like that... it's hard to change... sometimes the impatience will surface and I will 'chiong'.... but for short while only. I realised that the instant fuel meter and the average fuel consumption meter is very very useful in reining my driving in... hahaha... always trying to preserve the highest possible number of km/L... 

 

BTW, look at the one trip fuel consumption... that's more indicative... the average fuel consumption figure is averaged over the tank of fuel and is accumulated over all the trips so it's not very accurate. It can drop quite low cos you were caught in very bad traffic jam for one or two trips in that tank of fuel. So the one-trip figures are always more reliable for your fuel consumption for that trip.

Edited June 26, 2016 by teomingern

[Eviltrap]

When I had my K5, my best was 11 plus km/L. Don't remember going beyond that. And that was achieved while driving on NSH. Singapore roads very difficult to achieve good FC unless you are very early or very late when traffic is smoother.

[teomingern]

Really? The engines for the Sonata and Optima are the same. But maybe the gearbox ratios and engine mappings are different.

[Muser]

Really? The engines for the Sonata and Optima are the same. But maybe the gearbox ratios and engine mappings are different.

Physically the same engine, but ECUs are definitely programmed differently since max torque and hp are both higher for K5, but what's likely more telling for FC is that Sonata peak torque arrives earlier (4k rpm, iirc), which would made a difference when driving in traffic, and could therefore affect FC. When I was choosing between K5 and Sonata (I ultimately bought neither), low-mid torque delivery was a big consideration and in my test drives, I found the Sonata needed lower revs to get moving.

[Notsogoodman]

When I had my K5, my best was 11 plus km/L. Don't remember going beyond that. And that was achieved while driving on NSH. Singapore roads very difficult to achieve good FC unless you are very early or very late when traffic is smoother.

Was that the 2.0 or 2.4?

[Kennethoka]

Physically the same engine, but ECUs are definitely programmed differently since max torque and hp are both higher for K5, but what's likely more telling for FC is that Sonata peak torque arrives earlier (4k rpm, iirc), which would made a difference when driving in traffic, and could therefore affect FC. When I was choosing between K5 and Sonata (I ultimately bought neither), low-mid torque delivery was a big consideration and in my test drives, I found the Sonata needed lower revs to get moving.

the extra hp for K5 is because K5's engine has CVVL but Sonata has not.

[teomingern]

the extra hp for K5 is because K5's engine has CVVL but Sonata has not.

 

Is that so? I always thought the engines are the same... no reason for the Sonata not to have CVVL... it helps to save fuel quite significantly...

[Muser]

the extra hp for K5 is because K5's engine has CVVL but Sonata has not.

Thanks for that info, interesting. K5 still makes peak torque and max power at higher revs than the Sonata, right? My guess would be K5 makes Sonata's peak torque at higher revs than the Sonata too.

[Kevinhwc]

Noob question. What's the diff between cvvt and cvt?

[Muser]

Noob question. What's the diff between cvvt and cvt?

CVVT refers to engine intake/exhaust valve timing, whereas CVT refers to continuously variable transmissions, which are a kind of automatic gearbox. K5 doesnt use CVT, afaik.

[Kevinhwc]

Paiseh..just Googled and realised both are not comparable. One is a gearbox and is an engine... muahahah...

 

Apple and orange comparison.

[Kevinhwc]

Since the ride does not come with an alarm system, anyone installed an aftermarket system utilising the existing remote and comes with remote start and panic mode?

[Kennethoka]

Is that so? I always thought the engines are the same... no reason for the Sonata not to have CVVL... it helps to save fuel quite significantly...

yah. I did mention in Sonata thread.

 

http://www.mycarforum.com/topic/2694083-hyundai-sonata-2015/?p=5714465

 

I understand on paper, CVVL suppose to be better, but in real world how much better I don't know. But base on the comment from Sonata and K5 driver, seems like not much different.

[Eviltrap]

Was that the 2.0 or 2.4?

 

It was the 2.0 version.

[teomingern]

Kenneth, actually it's the same engine... both Sonata and Optima have CVVL.

 

https://en.m.wikipedia.org/wiki/Hyundai_Nu_engine

 

Scroll down further and you will see that it is applied also to the Optima from 2014 to present.

Edited June 27, 2016 by teomingern

[Kennethoka]

Kenneth, actually it's the same engine... both Sonata and Optima have CVVL.

 

https://en.m.wikipedia.org/wiki/Hyundai_Nu_engine

 

Scroll down further and you will see that it is applied also to the Optima from 2014 to present.

I believe that the wikipedia is not much for singapore market. as you can see they never mention on sonata is using Nu engine, they only mention i40 and Optima K5. They mention Sonata is using Theta II engine which is slightly more powerful but less environmental friendly.

 

You can see the difference on all the Nu engine from the youtube link below

 

https://www.youtube.com/watch?v=_Svr0eqR06U

 

 

It shows that d-cvvt is less powerful than CVVL. since K5 is more powerful than sonata. I believe that K5 is CVVL and Sonata is not. Another tell tale sign is that the K5 engine cover shows CVVL and sonata only shows dohc 16V. you can google image cvvl and d-cvvt. 

 

Maybe that is one of the reason K5 has higher OMV than sonata. due to better engine.

Edited June 27, 2016 by Kennethoka

[teomingern]

I don't think so leh... the previous generation used the 2.0 L Nu engine. This current seventh generation carries over the engine from the previous generation. The Theta engine is the newer engine but we do not get those new engines cos they are all GDI or turbocharged. The OMV is considerably higher according to my SE.

 

See here... 6th generation.

https://en.m.wikipedia.org/wiki/Hyundai_Sonata

Edited June 27, 2016 by teomingern

[Kennethoka]

I don't think so leh... the previous generation used the 2.0 L Nu engine. This current seventh generation carries over the engine from the previous generation. The Theta engine is the newer engine but we do not get those new engines cos they are all GDI or turbocharged. The OMV is considerably higher according to my SE.

 

See here... 6th generation.

https://en.m.wikipedia.org/wiki/Hyundai_Sonata

Actually Theta engine is older engine, way back to 2009 when i get my Cerato Forte, 2.0L variant is already using Theta, Hyundai invented Nu engine is meet Euro emission standard. 

 

 

 

The Nu engine gains 5 pound-feet of torque compared with the 2.0-liter “Theta II” engine it replaces. The extra pep is made possible by the addition of direct-injection technology, which Hyundai calls GDI for “gasoline direct injection.” This technology more efficiently manages the way fuel is injected into the engine’s combustion chambers to improve both power and fuel economy. It is starting to become more commonplace as automakers look to comply with more stringent fuel economy requirements from the government.

 

the above quote is from http://www.forbes.com/sites/matthewdepaula/2013/10/07/2014-hyundai-tucson-gets-more-power-with-new-engines/#22e91cc11773

 

Here is another article from china website http://chinaautoweb.com/2012/03/kia-k5-gets-lighter-nu-engine-for-2012/

 

 

 

The new 2.0L engine, with the code name G4NA, is made by Hyundai Wia Automotive Engine (Shandong) Co., Ltd., in Rizhao, Shandong. It develops up to 162Ps (119) at 65000rpm and 194Nm at 4800rpm. Compared with the G4KD 2.0-litter from 2011 (rated 165Ps/6200rpm and 198Nm/4200rpm), it is slightly less powerful. Thanks to a 9% or 117.4kg reduction in weight, the Nu engine helps to improve the K5’s fuel economy by 3%, consuming about, on average, 7.5L of gasoline for 100km, according to DYK. It is matched to a 6-speed manual or automatic transmission.

 

Code name G4NA = Nu engine

Code name G4KD = Theta II

 

Edited June 27, 2016 by Kennethoka