Octane rating

[userfriendly]

Bakit masmataas ang octane rating sa Pinas kumpera sa US at Canada? Sa US at Canada, ang regular ay 87 octane, 90 yung mid level at 93 yung high octane. Pero sa Pinas, 93, 95 at may 96 pa yata.

Magkaiba ba ang standard o ang method of rating? Kasi di ba masmadumi yung gasolina natin?

[the_wildthing]

Magkaiba ang method ng computation. Nakalagay sa gas pump sa US kung ano yung method, di ko na lang maala-ala.

[yebo]

also, US spec cars have lower compression ratios (due to strict anti-pollution laws, less NOx on low compression engines) and do not require higher octane gasoline. to compensate for the lower compression ratios their engines have bigger displacements.

the philippines have taxation laws that apply higher taxes on bigger displacement engines. thus vehicles in the philippines have higher compression ratios to squeeze more horsepower from smaller engines. higher compression ratios require higher octane gasoline.

[boybi]

also, US spec cars have lower compression ratios (due to strict anti-pollution laws, less NOx on low compression engines) and do not require higher octane gasoline. to compensate for the lower compression ratios their engines have bigger displacements.

the philippines have taxation laws that apply higher taxes on bigger displacement engines. thus vehicles in the philippines have higher compression ratios to squeeze more horsepower from smaller engines. higher compression ratios require higher octane gasoline.

kaya pala minsan iba yung power output ng locally sold cars compared sa ibang countries. akala ko linoloko lang tayo ng car manufacturers.

[n2knee]

kaya magkaiba ang octane rating sa USA, Europe, at Asia ay:

sa USA/Canada, ang rating ay yung average ng RON (Research Octane Number) and MON (Motor Octane Number) = AKI. halimbawa ang unleaded fuel ay may rating na 97 (RON) at 87 (MON) ay magiging 92 (AKI) dito sa USA (97+87=184/2=92).

sa Europe at Asia ay RON gamit na pangrating sa mga gasolina.

[3ple4]

May 87 octane rating sa Metroil gas station sa Bocaue, Bulacan.

[ryan]

Among our local fuel variants, which one has highest octane rating? Is it Blaze?

[squala]

Ryan, SeaOil has 98 octane AFAIK, but really doubt it's better than what Shell and Petron have to offer.

[redorange]

also, US spec cars have lower compression ratios (due to strict anti-pollution laws, less NOx on low compression engines) and do not require higher octane gasoline. to compensate for the lower compression ratios their engines have bigger displacements.

the philippines have taxation laws that apply higher taxes on bigger displacement engines. thus vehicles in the philippines have higher compression ratios to squeeze more horsepower from smaller engines. higher compression ratios require higher octane gasoline.

That was true in the 70's and 80's but now it's no longer the case w/ regard to compression ratios. The C6 Corvette w/LS2 engine has a 10.9:1, Honda Civic Si w/ K series engine 11:1, Nissan VQ engine has 10.3:1, Toyota 2ZZ-GE engine 11.5:1, 1ZZ-FE engine 10:1. So as you can see we have more than our share high compression engines, we get big displacement because we like torque and you can't get that with a 1.5L engine and we drive longer distances at faster speeds which is not fun when you have a small engine. As far as taxes on big engines we have that also it's called a gas guzzler tax and pollution laws allow us to breathe our air instead of bumping into it like in Metro Manila w/ the smog.

BTW were I live 87 octane gas is now +/-$3.30 a gallon which is about $.87 per liter or P45.24 * a conservative P52:$1 exchange rate. You can add about 40 to 50 cent for 91 octane. Last I checked RP unleaded gas prices were P40.79 to 43.06 per liter and we don't get told in advance when gas prices will go up they just go up sometimes while you are putting gas on your car as has happened to me more than once. We are already hearing talks of gas at the $4 range by next year.

[niky]

Philippine RON ratings can be roughly translated as follows:

92-93 RON - 87 Octane, US (AKI)

95 RON - 92 AKI

96-98 RON - 93-95 AKI?

Of course, with different blends and additives, these aren't exact conversions. But it should be close.

Is Seaoil's 98 Octane the ethanol blend? If it is, it doesn't give quite the power of true 98 RON, I think. Ethanol is an octane booster.

[yebo]

higher octane does not mean more power from the gasoline. it only allows higher engine revs without knocking.

[Usting]

sa totoo lang kahti 98 0r 95RON ang ilagay ko walang pagbabago ang performance o sound nong engine.

[redorange]

higher octane does not mean more power from the gasoline. it only allows higher engine revs without knocking.

Correction higher octane allows a higher compression ratio w/o knocking. Knocking happens because the air/gas mixture in your cylinders detonates before it is fully compressed by the pistons at TDC. It is not determined by how high you rev your engine, you can run a low compression engine to 10K rpm if it was designed to handle the stress at that rpm. Higher compression ratios does equate to being able to produce more power. If you take 2 engines w/ the same displacement and cylinder count but different compression ratios the one w/ higher compression will produce more power. However, if your engine was desinged to run on low octane gas why would you run a higher octane and pay more at the pump since you would not benefit from any power gains.

[the_wildthing]

Ayun naalala ko na. Ang nakasulat sa gas pump ay R+M/2

Tama yung sa taas, average ng RON at MON.



...At si RON at si MON ay magkapatid na nakadiskubre ng Octagon. Ehehe joke lang.

Check na lang sa http://en.wikipedia.org/wiki/Octane_rating

[slamtaz]

BTW, were I live 87 octane gas is now +/-$3.30 a gallon which is about $.87 per liter or P45.24 * a conservative P52:$1 exchange rate. You can add about 40 to 50 cent for 91 octane. Last I checked RP unleaded gas prices were P40.79 to 43.06 per liter and we don't get told in advance when gas prices will go up they just go up sometimes while you are putting gas on your car as has happened to me more than once. We are already hearing talks of gas at the $4 range by next year.

out here naman 87 octane gas is about $2.95+/- per gallon imho, all these casinos help subsidize the cost hehehe

edit: so that should be about php40.50 per liter..

[OTO]

Ano yan, tubig?

May 87 octane rating sa Metroil gas station sa Bocaue, Bulacan.

[OTO]

96 RON
Blaze

95 RON
XCS
Velocity now replaced by V-Power
Gold
Infinity

93 RON
Silver
Xtra
Shell's unleaded
Total's unleaded
Shell's premium

Note that V-Power abroad has 97-98 RON. Dito lang po yung 95 RON na V-Power

[ssaloon]

yung 87 octane, regular gasoline. kaya meron sa province dahil yan gamit ng mga motorsiklo pati ng mga small pump boats.

[3ple4]

Sabi ng Suzuki Makati na dapat 95 octane rating ang ilagay ko sa 06 Grand Vitara (imported from Japan) ko kasi yun daw sabi ng Suzuki Phil sa kanila tsaka nakasult din sa gas tank. Do you think I should follow it? So far XCS ang gamit ko. I'd really prefer using Xtra Unleaded para mas mura. Will this affect the performance of my GV?

[OTO]

Kung ayaw mo masira... ;)

Sabi ng Suzuki Makati na dapat 95 octane rating ang ilagay ko sa 06 Grand Vitara (imported from Japan) ko kasi yun daw sabi ng Suzuki Phil sa kanila tsaka nakasult din sa gas tank. Do you think I should follow it? So far XCS ang gamit ko. I'd really prefer using Xtra Unleaded para mas mura. Will this affect the performance of my GV?