due to KL always jam here n there for no reason, 10W40 would best suits my preve.
unless you stay in rural area and no jam at all, 5W30 (ambient temperature 10 deg C) or 10W30, as long as it's 30, should be more than enough.

anyone using this Syntium 3000 SAE 5W-40? (ambient temperature 20 deg C)
how much petrol you can save between 30 and 40, save a penny loose a pound (being penny wise pound fool) paying a bit more for petrol, for the peace of mind.

exora for new couple? u wanna bring the whole family is it?! hahaha chill bro.. just kidding.. exora bold cfe is a good mpv if u ask me.. its just that the cost maintenance is double than preve.. ive seen the service maintenance schedule and the cost.. its higher becoz the interval is 5k whereas preve is 10k after the 10k mileage.. i think its due to the setting of the engine.. the bold is more power compared to preve although they r using the same engine.. therefore must had more frequent of maintenance...

The Jerking..... It is like driving a manual car but you didn't use the lower gear when the power is not there.  The "power supply" is not enough to move the car..  Therfore, the car is moving like a horse.  It is really uncomfortable.

You are in SC now?  please help me to check with the technician there whether there know what how to fix it... 

Hi..tomorrow I'm going for my 1000km service at the SC near Bayan Lepas...thought of using Petronas Syntium 3000 5W40.... need some input regarding this oil...FC will become better huh? Now my average is 10.9L/100...thanks

Why do you keep harping on ambient temperature..if ambient temperature should not exceed 20 deg C, I guess weight 40 should not be use in any hot and temperate countries liao...but weight 40 and 50 are PRECISELY what is needed in hot countries...in even hotter countries like the Saudi, weight 40 and 50 are the norm due to higher ambient temperature there.

Weight 40 can be use in Preve although for balanced performance and FC, weight 30 will be the recommended lube. Weight 40 is useful the car is constantly driven at high speed in highway most of the time where the engine temperature constantly remains at the high end. Otherwise, for better pickup and city driving along with better FC, weight 30 is recommended.

Same viscosity both 10W40 and 5W40. Not much difference between them in terms of viscosity.
Been using 5W40 for nearly 15K now. Cavino, save ur breath in teaching those who are unteachable.

Dun care since it was not mentioned in the car manual.

I use Persona leh. Not written there. Drillz please?

What i mean, perhaps both Proton / Lotus Engineers they know something but they cannot said it under corporate umbrella (i.e. press release). and they can loose their job if they say something contradict with corporate press release.

Is it? I saw Preve only. Preve got Campro IAFM engine, right? We are discussing about engine oil and I mentioned that those two multigrades have similar viscosity. Unless you cannot see my fuelly siggy about the car I drive, then I have nothing to say. 

I ask for your proof but you dun show it and ask for mine pulak. 
FYI, Persona car do not have CPS. 

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Added on July 27, 2012, 4:40 pm
Let him be lah.

Persona car is a CPS car? now who's the genius?

For the sake of argument, Persona's IAFM engine is not much different than Preve IAFM+. same engine block, slightly different head. Performance-wise is comparable.

Alamak....never thought my question can create this level of heat ....anyway sorry.. I also wonder why the manual stating 10W40....

Is this your response to me correcting you?
Here's your oil chart



Oh wait it is different from the oil chart in the manual, which one is right eh?   

FYI, Proton has changed their oil viscosity requirements in the user manual before for their Campro engine. So all I can say is the Lotus engineers sure can't make up their mind! 
ANYWAY. After all is said and done, better listen to Proton if you value your warranty.

Just opti is too technical reading into lots of stats without understanding the real world application of lube. I'm no master of lubes but I do spoke with sifus who's in the industries, thats why I'm keen on the subject. Don't really bother with too technical stuff coz it does not apply to our real world usage....only to the extreme or racers that these stats matters.

There is a little bit of truth to what opti mention. 5W40 and 10W40 do have their difference. If you have a choice, using 10W40 is always better than using 5W40 in our hot weather. However this is presuming both are the same grade of lube, ie...both mineral or both semi syn. If 10W40 is mineral and 5W40 is fully, I'll take the fully anytime coz fully does has inherent advantage that negate the differences.

What difference?....To achieve lower temp ie 5W, more viscosity improvers are used. Addictives are prone to worn out, used up, etc. So the longer you use the lube, the more viscosity improvers will wear out. Thus if you used to the max for both 10W and 5W, with all VI burned out, 10W40 will retain better natural fluidity vs 5W40. So when hitting high temp, the natural viscosity of 10W40 will be thicker than those of 5W40 . 5W40 will be much thinner by then due to loss of VI than allows it to change its viscosity and fluidity thus has lesser protection for bore wall, piston, etc. This is one of the aspect that makes the difference of 5W40 and 10W40. Note that naturally, 10W40 will be slightly thicker 5W40. However by operating temperature, they will hit the same viscosity due to VI addictives working here. Oh...just to mentioned by the time VI improves burn out in 5W and 10W, DAMAGES will have occured regardless of 5W or 10W even if 10W is slightly thicker....so its actually a mute point...

So Opti is correct if he says 10W40 is BETTER than 5W40 in our weather assuming both are mineral or semi. However Fully Synthetic be it true fully (without even needing VI improver) and highly refined mineral actually has a better base viscosity index WITHOUT adding it the addictives yet. So a 10W40 mineral IS NOT BETTER than a 5W40 fully syn for that matter. So when both addictives burned out, the fs base viscosity could still be equal or might even better than the 10W40 base viscosity.

What I'm peeved is he hinted or indicated 5W40 should not be used by just reading the ambient temperature without understanding the vi working...or that he read blindly and trusted 100% proton manual without understanding the stats he read and suggested to someone not to use it...

Oh...I'm a 5-6K service interval guy...after reading the long post above, you'll notice all negative effect arose WHEN ADDICTIVES start wearing out. So change the lube BEFORE it worn out thus I will never use a FS until 10K coz by then addictives will be greatly worn. Engine can still run but miniscule damage "might" have occur. It will accumulate till later in engine life, you'll spend a fortune fixing it. Why some cars can last 10K even 20K service interval....

1. Weather.....in our combination of humid, hot and very dusty weather...you can be sure you're engine oil is way dirtier than those in colder countries....lube DO OXIDISED faster in hot weather. Not to mentioned the contaminants.
2. Engine technology....better car makes has better engine filteration, working than ours...makes a difference in how long our lube can still lubricate.. So yes, a BMW engine filteration, working will ensure a cleaner and more efficient engine operation, it will AFFECT the lube usage too...don't you think.
3. Lube tank size...the bigger the tank, the more lube is filled in, the longer it will last...yes.....SIZE DO MATTERS.
4. Lube Quality Usage....some lube are specifically designed to be HIGH MILEAGE....yes this can last twice or triple as long. Also some car makes TESTED SPECIFIC FS with their vehicle thus can safely recommend those FS that can last twice as long in their vehicle.

Do note there are case in US where a luxury car maker extend their service interval mileage to cater for user demand...turns out few years later, they have to reverse their decision coz those cars that follows their interval....comes back with sludge. So you car can still runs nicely but unlike those in other countries that change car every 3-5 years, ours lasted twice or triple longers due to our high car prices....so change earlier or later, your choice, your later consequences...

Oh btw...I don't really believe in semi, really...these 2 lubes mineral and semi are practically the same for me (with ABSOLUTE 5K service interval) thus I always compare mineral with FS, not semi. AND mineral lube has no 5W, I believe, just semi and fs with their added vi improvers. FS I believe can last longer but with only hydrocracked refined mineral vs true syn....still a mineral albeit very high quality ones thus I can push it slightly longer, 7K maxed....tho I still follow 5K service interval for FS. Better safe than sorry.