Newer engines are designed to be more efficient, more clean, more quiet, and more easy to maintain...

Usually, designers don't need to design them to use higher compression.

Market demand...

The new Shell petrol continues to have a RON97 octane rating which Tuan Haji Mohzani said is regulated by the government. The price of RM2.15 is unchanged from before even though it is more expensive to produce than the previous V-Power. The extra cost of production is not entitled to the government subsidy which is why it costs more at the pump.

http://www.motortrader.com.my/NUS/articles..._712/page_m.asp

It is still RON97.

Seen it in Shell Petrol Station already....
Shell V-Power Racing (RED COLOUR)

But, i found out that, previously there are V-POWER (BLUE) one is not being sold at the petrol station already......

Can only see...
SHELL REGULAR (Green)
SHELL V-POWER RACING (Red)
SHELL DIESEL (Black)

No more V-POWER (BLUE)

there's an episode of fifth gear where the presenter (john bentley i think) tested several types of fuel into 3 cars of different ages. what can i remember is that advanced fuel only benefits advanced engines in high performance cars. i guess v-power blue/red fuel doesnt bring any improvement to cars aged more than 15 years...

Mind to enlight me more on that?

to me its just a trial and error and found out that it works better on higher performance car, but it just test on a single car, if more then 1 and all the same then can consider its truth, so cant directly saz that it do for all...

True that newer more advanced technology engines will show higher overall performance but the test didn't take into consideration improvements in things like acceleration, engine protection, noise, FC, etc.

High compession ratios are efficient. Squeeze more and you get more potential energy in the combustion stroke.

That's not always the case.
To compress petrol, you need energy to drive the preassure in the first place.

I thought it's supposed to clean the engine while you drive with V-Power because of the added additives. It should benefit old cars in some ways, right? Correct me if I'm wrong, I saw many old cars pumping V-Power once or twice a month to cuci engine.

True.
But I think modern engine designs are meant to be able to handle high CR. Most cars today have CR of 10:1. The Prius has 13:1.

The higher the CR, the more mechanical energy the engine can squeeze out of its fuel and air mixture, which makes the engine fuel efficient. But what you say is true. I think modern engineers have(almost) found the right balance between high CR while reducing the energy loss while doing so.

Hmm. . .gotta try one day. . .Any difference compare to Caltex's Techron ?? In terms of cleaning power. ..

the amount the fuel injected/ air the cylinder suck in then only give u the correct air fuel ratios........CR alone wont do much help here as air intake is not consistant and modern engine do have their fuel injector make nearer to the cylinder or even inside.........engine loading also changes the situation

btw higher the CR, more mechanical energy needed to make the compression ~ e.g. diesel engine usually have big starter motor and battery to start the car......... so does not mean it can squeeze more.......

an easier way to expain about why to use higher static comp ratio is,
when u do compress the mixture more n combust it,
the flame front produced becomes faster and turbulent,
thus a more powerful and faster down stroke is produced ( why ? a basic simple way to undestand this is first to understand Activation Energy/ Threshold and the Boltzmann curve, also a bit of knowledge in chemistry and physics would help ).
Lets not go into detail about the thermochemistry behind it , will leave everyone yawning here

Of course in the end without explaining anymore details, the ultimate goal in tuning/modifying an engine is to produce a combustion flame front as fast and turbulent as possible, in a controlled state .

Dun ask me how , i dun even drive a car

if i m wrong, please do correct me, its 5.49 in the morning and i m dead sleepy n not tinking right , oso i dun even drive a car, heck, wat do i know about engines right ?

Actually diesel engines squeeze more, up to 5 times more than petrol engines. Diesel engine compression ratios goes up to almost 50:1, compared to an average 10:1 in a petrol engine.

yalor yalor yalor , if can fit direct injection in ur engine, sure veli pawer wan, turbo oso lose
fuel efficient some more

My Nissan Sentra and Proton Wira when use the Shell V-Power like no power??? now the Caltex petro feel like more power then V-Power much..?!

Turbo will not lose. GDI does not produce that much more power. The Lancer 1.8 GDi produces about 7HP more than the standard 1.8 4G93 at 147hp, while torque figures are higher at about 180nm. That is still very far from 1.8 4G93 turbo that produces 205HP and 249nm of torque. The GDi would have better fuel consumption than a standard 1.8. Of course the best would be to use the popular 1.8 GDi Turbo that Mitsu has in some of their Lancer models.

Hmm... Try it again?
Maybe it's because of the fuel mixture...

I just finished the 2nd tanks of V-Power.

Here's my finding.
- Better power. Smooth acceleration.
Definitely Yes. You can feel better & smoother acceleration. IMO, it's indeed high quality fuel.

- Fuel saver
Big no no. It does not give more mileage as compared to the typical Shell Greeny. I find it gives poorer mileage (15-20KM lesser).

100% city driving.