if u compare with satria.. tgk la plak piston die besar camne.. skali nak tune mau beratus..

but still u got the point bro..

Since cubchai usually have a hotter engine and higher RPM compared to car, is it better to have greater RON.

If seeing with this article and we assume compression ratio is things we need to consider when selected octane number. it stated that Satria GTI with 10.5 compression ratio is considered high. And looking at list of cars which cannot used RON 95 is civic type-r which have compression ratio 11:1.

But if we look at some cubchai Yamaha 135LC for example, this bike have a high compression ratio too which is 10.9:1

As we can see, compression ratio can naturally increase due to formation of some carbon in cilinder room. In no time this 135 LC engine can naturally have 11:1 compression ratio too…

Is that mean LC is need to run RON 97? Remember, bike engine is heater compared too car, have a higher RPM and need more frequent engine oil change compared to a car engine.

Most cubchai have a lower comperession ratio for eg EX5 which is 9:1, this bike we can considered save using RON 95..

So what is other opinion about RON selection in other high compression cubchai?

Currently, I'm planning on doing a research for my FYP1 regarding the topic. The scope is limited to single cylinder engine, 4 stroke IC engine but any differences would be easier to be detect since there is only 1 cylinder..

Ron 95 and Ron 97 will be test for performance, carbon build up, exhaust output and fuel consumption..

I'll share with you the result. Now, I wonder if Modenas can provide us with 2 identical engine for our experiment.

Until then, I doubt we can expect much out of things.

saving ur money in a long run & even environment… So, Honda electrical car will arrive in Malaysia???

Shell V-Power in Malaysia is conform RON 97 with additives. Other countries V-Power maybe RON 99. Who care, what care u drive?

i have a classic car, Ford Escort. still i can use fuel RON97 unleaded?..because i check from the internet says need to install hardened valve seat. but i check on my manual book, the fuel rating for my engine (ford Crossflow) is 97 but didnt mention lead or unleaded…hm..so how..confuse already.

"Less vapour leaked through the the seal would ensure that the pressure control valve work better"..

Should read as..

Less vapour leaked through the seal would ensure less fuel loss through the seal.. The pressure build-up is not always enough to trigger the valve all the way to release the vapours into the air..

Well, a tighter fuel cap ensures that the seal between the filler neck and the cap is air tight. Less vapour leaked through the the seal would ensure that the pressure control valve work better. The pressure build-up is not always enough to trigger the valve to release the vapours into the air.. Some cars have plastic fuel tanks which allows more expansion thus less fuel loss..

Power, Milage or RON makes not sense in the parking lot but evaporation does. 0km/h Money Wise Brother… the car is not going anywhere but the petrol does sneaks out! Think about it.

1. I use petronas…for the RR points. Some statins at my area are very generous. RM30-180points. RM50-200 points

2. Support national company, not one coming from the land where drugs are legal, or from uncle sam's land.

3. Ron 97, though nowdays thast the only option at petronas.

I like Caltex with its reward system. RR has a delayed effect. Clatex you can get drinks right away.

Anyway, to find out more, you can read about gasoline in Wikipedia.

I use Primax 3. Can get RealRewards points for each Ringgit. Occasionally use Shell. I find that Primax 3 gives better mileage…but I would have chosen Shell if the BonusLink system gives a point for each Ringgit (BonusLink redemption more interesting). So, rewards system plays a big part to me. Fuel difference is quite negligible, I would say.

also, if i put one of those huge exhaust pipes, would it really effect my fuel mileage?

sori for out topic q. thanx.

is it true that cars like my kancil 850 ex 2001 should be filled up using ptronas's primax fuel rather tha shell's fuel. this is an advice given to me by my uncle who's a mechanical enineer. thanx.

Isn’t V-Power RON97 with additives?

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yes it's base on RON 97 with special additives

Paul Tan said,

V-Power is called Optimax in other countries and those are RON98, but it seems that our local V-Power is RON97.

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it called RON 98 due to it's process at the refinery that process that fuel.

ur campro knocking? try change the other varians of engine oil, and spark plugs. its not about ecu. last time it works in my wira, change to no.6 plugs from ngk, the knocking dissapers.

yeah, agree with motorhead, the best cleaning power is caltex

ermm.. caltex may not as powerful as primax, but it's cleaning power still the best… try fill full tank & start the engine in the morning, u can see the difference.. i used to ride my bike more than 150kmp, with caltex my bike vibrate lesser.. i too like primax, but sometimes i fill caltex oso, btw caltex stations r not so many….

Isn’t V-Power RON97 with additives?

What is the octane rating of Shell V-Power?

The Research Octane Number (RON) is 97.0 minimum and all cars can use this petrol.

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actually RON 92 and 97 have it's own additive. V power has it's own special blend additive. V power suitable to a car with turbo engine and engines have high compression ratio. also highly tune engine. all petrol basicaly are the same but how's it's been treated and additional additive makes it's different.

Shaolin Tiger said,

You can get RON100 here, somewhere near the old Subang Airport.

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wah ! what company produce that fuel? my refinery only produce Jet A1 la.

tell me la.

pinging and knocking nothing to do with ECU…u can request for a new ECU flash at any PE service center…its not gona solve much…u either tune it…to get the rite air/fuel mixture ratio thasts set by PDTT(that litle tuning device)..or use a proper semi synthetic oil….go to gen2club n u wil find out castrol is not recomended by gen2 owners…i use shell semi..and its very good..no sound and no nothing..only if i use v-power i wil have slight pinging…primax3 is the way to go….i recomend u go to Proton Edar batu Caves…Very good service…thr r 2 technicians there…who r very good n knowledgable abt campros…thy wil advice u