Are higher-octane gasolines always better than lower ones?

[Paul Javier]

Since high-octane is better in avoiding "unnecessary" or "pre-mature" combustion in your cylinders, is it "therapeutic" to your engine, thus making the life of your engine longer than the ones using lower-octane ratings or unleaded since day 1?

[[archie]]

I don't think so. It depends on the car. Higher compression engines need high octane fuel. For Econo cars that can take 91 Ron, I don't think it would matter.

[jut703]

If your car doesnt need it, then no. More placebo effect than real improvement in performance for econoboxes.

[greatauror28]

This is among the list of top money-wasters of all time.

Placebo effect to the fullest eh!

[nivraarvin]

Most people are aware that "high octane" fuels resist pre mature ignition, or engine knock, especially on high compression engines.

But octane number is also the iso-octane content of a fuel. Set aside ethanol kasi panggulo lang yun. The main components of gasoline are iso-octane and n-heptane.

A gasoline with pure iso-octane will have 100 octane number. This will also have a higher energy content compared to a 95 octane gasoline(5% n-heptane, 95% iso-octane). Whether your engine is efficient enough to extract that and convert that to noticeable power is another question.

A Honda Civic may gain or regain 1hp. A Bugatti Veyron?

[dr. d]

Since high-octane is better in avoiding "unnecessary" or "pre-mature" combustion in your cylinders, is it "therapeutic" to your engine, thus making the life of your engine longer than the ones using lower-octane ratings or unleaded since day 1?

waste of money, if you ask me.
but then, there's always somebody out there who will swear his drive "improved significantly" when he switched to hi octane..
but i feel that if one's car is in such poor condition that it is pre-igniting, then switching to hi octane fuel might diminish the pre-ignition and actually "work wonders" on his engine..
my 86 centavos' worth..

[siopaonatoasted]

Hi-octane fuels are useless in city drives, di ka naman makabwelo so what is the use. Wala naman tayo dito mga interstate highways na you can go rezing rezing na wala kang sasalpukan na waiting shed or by standers.

Kakabasa ko dito sa tsikot ng hi-octane ek ek na yan, nagkarga rin ako ng petron xcs sa innova, linsyok parang uhaw na sumisipsip ng zesto yung sasakyan, kaya ayun balik ako sa fuel save ng shell.

[Paul Javier]

Hi-octane fuels are useless in city drives, di ka naman makabwelo so what is the use. Wala naman tayo dito mga interstate highways na you can go rezing rezing na wala kang sasalpukan na waiting shed or by standers.

Kakabasa ko dito sa tsikot ng hi-octane ek ek na yan, nagkarga rin ako ng petron xcs sa innova, linsyok parang uhaw na sumisipsip ng zesto yung sasakyan, kaya ayun balik ako sa fuel save ng shell.

nakow, so totoo pala tlaga na mas maaksaya ang high-octane?

[kisshmet]

the potential of a high octane fuel can only be eminent in an open free flowing traffic like in the hi-way. so if you want to tap the potential of an energy packed fuel, use it only in your out of town trips especially if your car is pretty much loaded.

at 0kph (idle speed) the energy potential of premium fuel is simply atrophied. so if you drive alone more in the city, then a low octane fuel will be more cost effective

[Walter]

Just follow the minimum octane requirement of your vehicle. It's in the manual. Like for example, a 1st gen CR-V requires minimum 95 octane fuel.

[[archie]]

Just follow the minimum octane requirement of your vehicle. It's in the manual. Like for example, a 1st gen CR-V requires minimum 95 octane fuel.

Teka, totoo 95 Ron minimum ng 1st gen crv? I've been using fuel save for the longest time. Hehe

[Veilside]

It depends

If you want additional kick or boost when driving, go for higher octane fuel.

and for ME hindi siya placebo effect kasi ramdam ko talaga yung difference sa 93 octane fuel.

additional 2-3 pesos/liter = fun to drive & better FC ( just my opinion and experience po )

(by the way I'm using 100 octane fuel.)

[jhnkvn]

It depends

If you want additional kick or boost when driving, go for higher octane fuel.

and for ME hindi siya placebo effect kasi ramdam ko talaga yung difference sa 93 octane fuel.

additional 2-3 pesos/liter = fun to drive & better FC ( just my opinion and experience po )

(by the way I'm using 100 octane fuel.)

Octane is simply a number attached to your fuel that says "I need X amount so I won't knock". Using it as a metric for performance is simply bad. For one, ethanol has less energy compared to gasoline but has a higher octane rating.

As with what nivraarvin said, it's the energy content of the fuel that counts. Hell, if they can compact a nuclear reactor into a car's engine, I don't care about its octane number. All I know is that I'll die the moment I drive it.

[Bin Diesel]

Depende din talaga sa requirement ng sasakyan, sa sentra namin ok na ang shell unleaded pero sa grandlivina namin makukunsumi ka kapag mas mababa sa 95 ang octane rating ng gas na ikinarga.

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[siopaonatoasted]

May mali kasi sa tanong, di kasi ni describe ang situation, better than lower ones in what condition?

1. Just follow the minimum octane rating of your car and you will not encounter any problem.
2. Gusto mo rezing rezing, sige mag higher octane rating ka.
3. For city driving, just stick with your minimum octane rating, sabi ko nga, I have tried Petron XCS sa innova vvti pure city drive, parang naka straw yung engine kung humigop. Di pa ako ang try gumamit ng Shell V-Power Nitro sa vvti.

[kisshmet]

May mali kasi sa tanong, di kasi ni describe ang situation, better than lower ones in what condition?

1. Just follow the minimum octane rating of your car and you will not encounter any problem.
2. Gusto mo rezing rezing, sige mag higher octane rating ka.
3. For city driving, just stick with your minimum octane rating, sabi ko nga, I have tried Petron XCS sa innova vvti pure city drive, parang naka straw yung engine kung humigop. Di pa ako ang try gumamit ng Shell V-Power Nitro sa vvti.

there is an adage that says "old habits are hard to die".

coming from a 91 or 93 octane & switching to 95 octane the driver need not step as hard as they got accustomed to with lower octane gas because higher octane gas has more energy to dispense. this is probably the reason why people think its a placebo effect, they tend to push as hard the gas pedal with a higher octane as they would with the lower octane gas. the overall result is more frequent over revolution when accelerating which leads to more fuel consumption

the key to saving fuel is to rev up (2thou rpm) smoothly before shifting the gear up as fast as you can, assuming the traffic condition permits you to do so

[siopaonatoasted]

there is an adage that says "old habits are hard to die".

coming from a 91 or 93 octane & switching to 95 octane the driver need not step as hard as they got accustomed to with lower octane gas because higher octane gas has more energy to dispense. this is probably the reason why people think its a placebo effect, they tend to push as hard the gas pedal with a higher octane as they would with the lower octane gas. the overall result is more frequent over revolution when accelerating which leads to more fuel consumption

the key to saving fuel is to rev up (2thou rpm) smoothly before shifting the gear up as fast as you can, assuming the traffic condition permits you to do so

Not really, I drive 1km four times a day, and from house to office di ako umaapak masyado sa accelerator, and ito pa ha, kapag nag cold start ako, mula bahay hangang office, yan yung umaga na trip, walang accelerator hangang 5th gear at ang takbvo ay nasa 40km/h max ng innova vvti, pero mas mabilis maubos talaga ang xcs compared sa fuelsave, and that is not placebo, kasi ganun talaga ang pag drive ko. I am not expecting any additional horsepower sa higher octane, I am expecting more fuel savings. Pero yun nga, mas mabilis pa tuloy maubos.

[jut703]

Petron nagsimula ng octane war na yan, which was effective, if not misleading.

Now ewan ko lang kung may equity pa ang higher octane sa mga tao.

[kotiko]

Personally, I gas up with higher octane (95 to 100) when I'm on a highway/long drive. This way hindi naman totally sayang, and you get better performance while on the open road. Otherwise kung city driving with the usual EDSA/C5 traffic, I just stick to 91 or 93.

From my experience, mas mabilis maubos ang higher octane pag nattraffic at nakatengga lang ang sasakyan.

[R.Paul]

Di rin naman ako naniniwala sa placebo effect na yan. Before 95 octane ako then napansin ko na medyo nagiba takbo ng engine ko saka ang lakas ng vibration pagshut off ng engine. Yun pala nagadd na sila ng ethanol di ko lang napansin agad ung memo sa tabi ng mga pumps. Kaya aun switched to 100 octane whether city or highway drive.



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