Octane of Gasoline, What Is It? How It Works?
Written on: 04-05-2013 01:29pm Title: Octane of Gasoline, What Is It? How It Works?
The gasoline octane is not related to an increased power of the engine, but is a unit measurement of the power antiknock of the gasoline in question.
There is a widespread belief that higher octane gas with are able to deliver higher performance, more power and less abuse to the vehicle engine. This is completely false.
In contrast to what many drivers believe that it is true, the level of octane in gasoline does not indicate the purity or quality, nor the force that fuel can deliver. Actually, the octane rating is the unit of measurement to indicate the level of the antiknock power of fuel, in other words, the higher is the octane rating, less explosive will be the gasoline.
This gradation in octanes is used to identify the different levels of anti-knocking of the fuel, thus being able to select the appropriate for the level of compression that engine pistons of our vehicle are capable of reaching.
Thus, if a high compression engine is fed with low octane gasoline, the mixture will ignite spontaneously due to the heat generated in the compression itself and before the piston reaches the upper dead point of its travel, or rather, it will explode before the piston has reached its highest level of compression and before the exact moment of the spark plug ignition. The result will be an inefficient ignition of the engine, higher fuel consumption, loss of power and the odious "tinkling".
When you feed a low-compression engine with a high octane gasoline, what you will get is a incomplete combustion due to deficit of the temperature reached by the mixture during the compression stage, so that, in the end, the engine will be eliminating gasified gasoline and uncombusted, along with exhaust gases.
A bit of general automotive knowledge is not bad for this spring Friday .
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Location: San Francisco, CA
glad to know this, I have to admit that I am one of those who thought that the greater octane rating in gasoline mean a better quality
Location: Baltimore, MD
One of my workmates has a Honda Civic and he puts premium gas to it because he says he likes to take care of his "nice" car, what a dick, I'll share this post with him.Looking for some affordable car for my son!
Location: Atlanta, GA
Great to know this, I'm happy my car uses 87 octane, thanks John!Peace, Love, United, Respect... that's my religion ;-J
I would never buy a car that uses the premium octane, gas is so expensive these days and the most probably is that next year is going to be even more expensive.