Higher RON = More Power?

[Vinceng]

My Daihatsu Sirion 1.3 has min RON of 91.

 

Always been pumping 95RON until recently, pumped 2 tankfuls of 92RON discovered some sluggishness whenaccelerating and mileage dropped by about 1km per litre.

 

My friend who drives a petrol driven Toyota Hiace school bus also told me he pumped 95RON due to lack of power for 92RON.

 

is this true, or must engine timing be retard for it to accept 92RON?

Edited August 28, 2012 by Vinceng

[JaydenSTI]

Most likely is your mind playing a fool on you...... Since min is 91, anything below that will cause knocking on your engine........ Above that, waste $$........ you pump 120 also won't increase power.......

[Tigershark1976]

I have mentioned it many times... ron rating have nothing to do with the engine power. A higher ron rating petrol is required for higher car compression engine to prevent engine from ping. Getting petrol with higher ron rating required is nothing but contributing bonuses to those petrol companies.

 

Do a blind test, ask your friend to pump petrol for you for a few rounds without telling u what petrol they pump.... trust me, you cant tell the diff....

 

btw, of pumping higher ron rating could bring more power. Then why buy car with higher capacity?? just pump Ron 98 + ron booster will do the tricks... LOL

Edited August 28, 2012 by Tigershark1976

[Deckbuild]

Delete

Edited August 28, 2012 by Deckbuild

[LoverofCar]

I only heard turbo car need higher RON petrol...

[Vinceng]

I was told that for 16 valve engine, better to pump at least 95RON.

 

Any truth in this?

[Racing]

  On 8/28/2012 at 1:41 PM, Vinceng said:

I was told that for 16 valve engine, better to pump at least 95RON.

 

Any truth in this?

 

 

look at ur car manual.

 

i remember latio is min 91

lancer 92.

 

[Fd60]

r u seriously fking kidding me ? u guys still pump 91/92 ? want ur engine die sooner go ahead . in nowadays car all recommended is 95 . higher performance cars like turbo n v8 uses 97/98 . seriously u guys got to be joking me . YES someone mention retardation of ignition timing auto self adjust system . that is true . tat is why the car will feel sluggish , not to mention knock too . walau please loh . 91 ron realli sad case lei . dirty the engine n no power some more . u tink u guys living in 3rd world country where they have no choice but to use lower octane ar . omg use common sense a bit .

 

since someone mention a blind test . i dare to take on the bet . 1 full tank . lai come bet wif mi . there is a difference plz .

Edited August 28, 2012 by Fd60

[C-K]

  On 8/28/2012 at 2:01 PM, Fd60 said:

. u tink u guys living in 3rd world country where they have no choice but to use lower octane ar . omg use common sense a bit .

 

In the US, most gas stations only have RON91 to 93 leh... My friend's Corvette (C6) only requires RON91, but he always pumps RON93. So far, nothing is wrong with his car leh..

 

Is USA less developed than Singapore?

Edited August 28, 2012 by C-K

[DonNuTs]

  On 8/28/2012 at 2:33 PM, C-K said:

In the US, most gas stations only have RON91 to 93 leh... My friend's Corvette (C6) only requires RON91, but he always pumps RON93. So far, nothing is wrong with his car leh..

 

Is USA less developed than Singapore?

 

 

Bro, US fuel uses a slightly different rating. But essentially, it goes like this

 

It turns out that in Europe, the octane number posted is determined by the RON method (if you live in Europe, check the small print on the gas pump next time you fill 'er up. Wait, filling it up requires taking out a loan nowadays...). In the USA, the number posted is according to the "(R+M)/2" method. Turns out that this is simply the average of the RON number and the MON number. So, would the MON number typically be lower than the RON number? The answer is....yes! Apparently, for modern fuels, the difference between RON and MON (also called sensitivity) is about 10 (RON is higher than MON). Knowing this, we can now calculate the following:

 

87 octane in the USA = 92 octane in Europe

89 octane in the USA= 94 octane in Europe

92 octane in the USA = 97 octane in Europe

 

Higher Octane rating does give car more power if the engine can maximise(like Type R and WRX) and the ECU can advance the ignition. But it will hit a ceiling when the ECU cannot advance anymore. Thats why some feel that there is a difference in pumping high octance fuel where some cannot. depend on the car.

 

Fuel efficiency does depend on the engine and the RIGHT FOOT.

 

For more detail on octane rating please read it in wiki.

 

http://en.wikipedia.org/wiki/Octane_rating

 

and here.

 

http://oldeloohuis.com/octane.html

Edited August 28, 2012 by DonNuTs

[Unclelee]

  On 8/28/2012 at 2:01 PM, Fd60 said:

r u seriously fking kidding me ? u guys still pump 91/92 ? want ur engine die sooner go ahead . in nowadays car all recommended is 95 . higher performance cars like turbo n v8 uses 97/98 . seriously u guys got to be joking me . YES someone mention retardation of ignition timing auto self adjust system . that is true . tat is why the car will feel sluggish , not to mention knock too . walau please loh . 91 ron realli sad case lei . dirty the engine n no power some more . u tink u guys living in 3rd world country where they have no choice but to use lower octane ar . omg use common sense a bit .

 

since someone mention a blind test . i dare to take on the bet . 1 full tank . lai come bet wif mi . there is a difference plz .

 

seen like you dun travel enough. Thailand, Indonesia etc.. most petrol station only have 91, u can hardly find 95. why i dun see any engine die there?? just follow your car manual unless you are trying to said they are fool to put 91 on their car manual..pls go and check before you post.

 

[C-K]

Thanks for the clarification.

[5936]

Additives played an important role in today's Reformulated fuel too.

 

Additives may : reduce friction or/and increase combustion.

[Kwanheng]

i tell you the higher ron you pump the better the millage, who's with me?

 

tested on 2 cars, both same effect.

 

i don't travel much and i pump around 300 liters per month.

 

 

[Mllcg]

watch this video...

 

posted MANY times on MANY forums

 

[HOUSENUMBER]

people like it can already

[Roadhogger]

  On 8/28/2012 at 1:41 PM, Vinceng said:

I was told that for 16 valve engine, better to pump at least 95RON.

 

Any truth in this?

 

How about 20 or 24 valves engine?

[Kr_toy]

  On 8/28/2012 at 12:35 PM, Tigershark1976 said:

I have mentioned it many times... ron rating have nothing to do with the engine power. A higher ron rating petrol is required for higher car compression engine to prevent engine from ping. Getting petrol with higher ron rating required is nothing but contributing bonuses to those petrol companies.

 

Do a blind test, ask your friend to pump petrol for you for a few rounds without telling u what petrol they pump.... trust me, you cant tell the diff....

 

btw, of pumping higher ron rating could bring more power. Then why buy car with higher capacity?? just pump Ron 98 + ron booster will do the tricks... LOL

 

for most japanese car with small engine sold here, there is a difference because the ECU normally is mapped to aggresive timing to optimize power and fuel economy, so if use the minimum octane the power produced is not the best the engine can produce.

Even on Latio manual, even it says min octane 91, it also says don't jackrabbit the car because it may induce knocking and damage the engine. It says to accelerate gently when use low octane.

so far the one that I know does not make difference is those american cars with 2.4 or above like PT cruiser, etc. or some sold in our neighbour country where low quality gasoline is prevalent, e.g. toyota avanza, innova, suzuki baleno, etc.

 

However beside RON, there is another component in fuel that also plays a part like friction modifier, cleaner, etc as well as delivery and storage issue so sometimes RON 98 in Singapore may not feel better than Malaysia Ron 97.