Do you get more Kilometer on a high Octane Gasoline?

[j_avonni]

Before, alternate ang karga ko ng 93 & 95. Pag ako bayad 93. Pag iba 95. Computation ko halos pareho lang.

[Shadetree MKNX]

Here's the logical approach to the question:

An engine's power-producing efficiency closely correlates with how optimum the spark timing is, among other things (but let's just concentrate on spark timing for now, cause that's the aspect that mostly relates to the gasoline octane). Optimum spark timing is somewhere around 7-13 degrees BTDC, whereupon the combustion occurs right when the conrod and the piston are in the best position to kick on the crankshaft. Any more advanced than that and the piston is going to "kick" a little too early, and a little more later than that, well, it'll be a little too late.

Problem is if the fuel does not have enough "self-ignition" resistance, once the spark plug starts the flame kernel, the sudden increase in combustion pressure will cause the "end gas" to ignite on its own. This will cause 2 flame fronts to collide, causing a violent explosion inside the chamber that we hear as "knocking" or "tope".

Knocking is a wasteful kind of combustion because all the energy of the gas is concentrated on a very little span of time, thereby not allowing most of the energy to be converted into useful "work". Because less of the fuel's energy is converted to work, there will be less of a distance covered by any given amount of fuel, hence less fuel efficiency. In addition to that, EFI-equipped engines automatically retard the fuel timing, thereby reducing the engine's efficiency. Besides all that, it is such a violent reaction that it can cause damage to the engine if allowed to occur too often.

One way to minimize, if not, eliminate Knocking, one has to either retard the timing or use more expensive higher octane fuel. So the bottomline is, are you going to be saving more money using lower octane fuel and travelling a shorter distance, rather than spending more money using higher octane fuel but travelling a greater distance?

[badkuk]

for some reason, parang mas ok ang andar ng ae92 xl namin pag 93. i loaded it with 95 once, parang humina ang andar. labo no?

[ale828]

in a 03 CRV with a VTEC engine, i think a 95 is good for it but a sometimes you might be find the better fuel economy on the 95 octane because you usually press the gas pedal more if you use the 93 octane to acheive the desired acceleration. it all actually depends on your driving, If you drive economically on the city i think the 93 octane is acceptable for smaller engined cars but the 95 octane would be more benificial on highway driving.

[maop99]

Tried to change it once parang pareho lang, try ko nga ulit baka may difference na ngayon? hehehe

[chieffy]

more mileage ako sa civic 1.6 kapag 95 RON gamit ko...

[raikonnen]

ako din more mileage ako sa 95... naka 97vti naman ako...

[Karding]

maidagdag ko lang na parang hindi ko ramdam ang price difference ng regular $2.31/gal and premium $2.51/gal. It looks like it boils down to the car's fuel consumption.

10gallons of regular is $23.31
10gallons of premium is $25.51

Now, what can I do with $2.20?! McDonalds burger? hehehe

[ILuvDetailing]

more mileage ako sa civic 1.6 kapag 95 RON gamit ko...

ako din more mileage ako sa 95... naka 97vti naman ako...

in a 03 CRV with a VTEC engine, i think a 95 is good for it but a sometimes you might be find the better fuel economy on the 95 octane because you usually press the gas pedal more if you use the 93 octane to acheive the desired acceleration. it all actually depends on your driving, If you drive economically on the city i think the 93 octane is acceptable for smaller engined cars but the 95 octane would be more benificial on highway driving.

AFAIK, Honda (newer VTEC engines) requires an octane rating of 95 RON, because it is a high compression engine, anything less than that will make it burn more fuel. So it really depends on the engine requirements.

[raikonnen]

pero sa states ang baba ng octane rating nila, lalang... 87 pinaka mababa nila... pag naka 93 auto nila tuwang tuwa na sila. tyo parang halos itapon na natin ang 93 octane hahahaha....share ko lang mga dudes =D