Whistling sound may be a more appropriate term to describe the CVT's wooooo wooooo sound. WHen you mentioned grinding sound, it's more to the sound of a bunch of metal plates grinding or rubbing against each other in an "unbroken" Ford Focus.

The key should be left in the key fob. I think that was mentioned in the user manual.

Throughout my 20+ years driving experience all my new cars do not have this "engine automatically shutting down" syndrome at all, either during startup from cold or reversing. Not even the Proton Waja that i have driven for 12 years. I only experience the engine automatically shutting down when restarting the engine with the Proton Waja when it was about 10 years old ie. an old car.

Is your car modified in that you can achieve close to 230km/h?

Not too sure what is German sausage. But it is a good revelation that the Preve Turbo is capable of 225km/h with a bit more reserve in hitting a higher top speed. Just a bit surprised on the potential of the car as in my experience the car needs quite a bit of time ie. struggling when accelerating from 170km/h to 200km/h.

I guess the road would be slightly downhill for the car to be able to hit that kind of speed.

Okay thanks for the information. No idea what is German sausage as I do not have a passion or interest in modifications.

Is it really due to the expansion of the original rubber hose, or the aftermarket stainless steel hose has a smaller diameter than the original hose which caused the pressure to increase when whatever gas or liquid flows through it?

After Simpang Pulai, there is a steep stretch of road up a hill and then downhill with twisty bends. On this stretch of road the speed limit is down from 110km/h to 90km/h, large heavy trucks usually crawling like a snail on the left lane. Faster cars still can do 110km/h but along the twisty bend near the top of the hill it's quite a task to drive up to 160km/h along this stretch. Perhaps after this stretch then high-speed cruising is feasible.

Yes, Gua Tempurung area. Quite a number of accidents here throughout the years. More than 10 years ago, heard about a family who just sent their child off to the airport for studies overseas perished when their vehicle lost control and crashed. Not too sure about the recent accidents.

From the speedometer, it is obvious that the acceleration is uniform up to about 165km/h, in which it is struggling to climb to 170km/h. The speed stays at 170km/h for a while as I presume the driver released the pedal a bit which resulted in a drop in rpm, before stepping on the pedal to enable the speed to climb from 170km/h to 200km/h until hitting 210km/h.

The video above further reconfirms on my observation that the Preve Turbo's acceleration is good up to about 160km/h in which it struggles to hit higher speed after that, 160-170km/h being the struggling point.

I have mentioned before above 170km/h or close to 200km/h, the sound of the engine is so loud that it feels like it's going to explode or something. Though it is capable of breaching 200km/h for sure, but the feeling of reaching those speeds isn't really nice due to the sound from the engine and the unstable ride.

The floaty feeling of unstable ride is due to the suspension of the car which is tuned that way. The suspension is on the firmer side of things. It not only feels floaty at high speed cruising but when going over speed bumps at low speed, the stiffness of the suspension/springs also causes the car to be a bit bumpy ie. not so comfortable.

This post has been edited by SportyHandling: Apr 13 2015, 02:19 PM

It is confirmed that Petronas fuel is causing knocking sound from the engine on my Preve Turbo with a slight loss in power.

I have been using Caltex throughout the whole year now, occasionally Shell if I happen to run out of fuel and Caltex station is not nearby. No knocking sound and acceleration power is good. Just earlier this week the car was running out of fuel and I decided to give Petronas a try although I knew I had bad experience before and vowed never to use Petronas Primax again. But somehow I wanted to test if it's really the fuel. At first, there seemed to be no difference. But after half tank, I began to notice the knocking sound coupled by a slight loss of acceleration power. The engine also sounded a bit rough, not as smooth.

Did any of you guys use Petronas Primax, especially Preve Turbo owners. I would like to know your experience.

After having this repeated experience, I will surely ban Petronas for good now. My other car, the Ford Focus does not seem to have problem with Petronas (no engine knocking sound) but I chose to use Caltex for all my cars.

I used to choose using between BHP or Caltex since both also have their own petrol cards which can score points. But after a while I chose Caltex as BHP stations are not at strategic locations on my everyday routes. There are also not may Caltex stations around but at least there are more of these stations on the roads that I travel. Both are equally good I think. Can really feel the power and smoothness with Caltex.

Similarly would like to use Petronas as their stations are almost everywhere, so convenient. But time after time had again proven that their fuel does not go well with certain cars. I suspect the knocking sound from the engine is due to the loss in power or the fuel not burning properly or something. Due to the weak power, the engine is producing this knocking sound when the car is struggling to accelerate.

No engine knocking or rough acceleration sound with Petronas? Fuel consumption with different fuels is difficult to gauge due to varying driving patterns and traffic conditions, though I was not referring to fuel consumption. More to the performance of the fuels.

Ok thanks for the information. Looks like we do not share the same experience with Petronas fuel.

That may be a possibility. But still, even in moderate acceleration especially when the road is slightly uphill, the engine knocking sound will come up, coupled with rough sound during acceleration, with Petronas fuel. With Caltex, BHP and Shell, no such experience. Maybe my car had been "broken in" with occasional hard acceleration, hence the showing of some of these symptoms with Petronas fuel being unfavourable.

When I mentioned "broken in" I was referring to the car being driven at high speeds or high RPMs, not so much about mileage. At 71,000km, the mileage on your car is significantly higher than mine at about 30,000km+. Perhaps you don't drive at high speeds too often or at all keeping your speed to below 110km/h, or the needle on your RPM meter did not go past 4,000 before?

My car already had the engine knocking sound during the early stages in the 1st year of ownership.

For those who are using Petronas fuel on the Preve Turbo, do you hear the engine knocking when the car is accelerating, particularly if going up a slightly inclined slope? Try to hear some clicking sound from the engine when the car is accelerating. The sound is not very loud, but it should be noticeable.

Okay thanks for the information. I have not tried RON97 on the Preve Turbo before, only RON95. Helicopter sound with the brakes will only be heard during hard braking. Normal braking there won't be any sound.

Interesting. I just had some slight knocking sound from the engine even though I had pumped Caltex since it had mixed with the previously pumped Petronas. After 1 or 2 more tanks with Caltex(after all Petronas fuel is fully utilized), I will monitor again. With my Preve Turbo, there is no engine knocking with Caltex fuel. Perhaps very little knocking even if it comes up especially when the car is accelerating up an inclined slope where more effort is needed for acceleration. But with Petronas fuel, the engine knocking sound is quite prominent. Although soft you can easily hear the knocking/ticking sound from the engine in the background. RON95.

Wise choice not to do hard acceleration with the car (>4000 RPM) as the sound from the Campro engine is unpleasant with any hard acceleration RPMs >4000 ~ 5000 +. Sometimes if there is a need for quick acceleration, there is a tendency to step hard on the pedal thus driving up the RPMs, though in actual fact the acceleration may not be quicker than acceleration in lower RPMs ie. 2000-4000 RPM which I understand is the ideal RPM range where the highest torque is available.