# Definition Of Cost Price In Math latest 2023

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## Save Money On Gas – The Octane Factor

With gas prices these days (over US\$3.00 per gallon at the time of this writing), most people

are feeling the economic pinch and wondering what they can do to reduce their gas costs. This article outlines one of the many ways to get as many miles per dollar as possible.

When it comes to the quality of gasoline or the octane rating you put in your car, “Higher is better”, right?

Not always. There are a number of myths surrounding the use of high octane gas.

Myth #1 – Using high octane gasoline will make my car perform better.

Not exactly. If your car “clicks” or “knocks”, a higher octane gas will help or eliminate the ping and save your engine, but it won’t directly add power. However, this prevents your electronic ignition from retarding timing as an “anti-knock” measure when a ping is detected.

Myth #2 – My car will get more miles per gallon using higher octane gas.

Since higher octane gas does not produce more power, you will not get better gas mileage.

Myth #3 – My engine will run cleaner and produce less emissions and smog with higher octane gas.

Not true. Many oil company advertising methods may lead you to believe this, but octane has nothing to do with how “clean” your engine is.

Myth #4 – Octane is added to gasoline to produce better quality fuel.

No, actually Octane is the essence, at least most of it. See octane rating below.

You can save money on gas simply by using the lowest octane gas your car will tolerate. Use of higher octane rating

gas than what the manufacture says is just a waste of money. If you are unsure of the octane rating your car is rated for

use, you can start with the lowest octane gas (87 in most areas) and try it. If it pings under load, move to the

What is “Pinging” or “Knocking”?

Most of us have heard the rattling noise under the hood, usually when the engine is under extra load like

climbing a hill, towing a boat or in a loaded truck. The noise itself is caused when the air-fuel mixture in the

the compression chamber ignites too soon (pre-ignition or detonation). This condition causes the air-fuel mixture to burn unevenly and

produces the ping or knock sound. This uneven combustion causes flash points in the combustion chamber and can damage the engine.

What does Octane do?

Without getting into all the chemical properties and technical stuff, basically octane increases the

combustion point of gasoline when under compression and slows combustion. The result is that it does

gasoline less volatile so it doesn’t ignite before your ignition system fires it at the right time.

The intent of octane is simply to provide an anti-knock property.

octane rating

The octane number you see at the gas pump is simply a percentage of the chemical octane in the

gasoline mixture. In other words, if you buy gasoline with an octane rating of 87, that mixture contains 87% octane and

If your car requires higher octane gas, you can use “octane boosters” available at your local auto parts store. The cost

and effectiveness will vary. Try a full tank with an additive to see if your can works properly on it, then do the math to see

if that makes sense. Here is a cost analysis for my 1993 Mustang GT:

Example: 1 bottle of additive to boost a tank of gasoline costs approximately \$5.00. With a 15 gallon tank, that adds about \$0.33 to the cost of each gallon of gas, plus the hassle of going to auto parts to buy it and remembering to add it each time you fill up.

If you really want or need a high octane mix, you can create your own.

There are a number of websites and blogs that publish the recipes or “home brew”. I’m not going to post it here because I can’t directly endorse the

the use or safety of doing it yourself. However, if you are looking for a xylene or toluene octane boost recipe, you will find it there. Chemical products

xylene and toluene are superior “quality” and can produce an increase of more than 100%. The chemical Octane alone, by definition, can never produce more than one

octane number above 100.

Other Ping Solutions

If your car continues to ring or knock even though you are using gas with an octane rating equal to or higher than your car manufacturer specifies, this

is an indication of engine problems that you should have your mechanic look at. There is a well-known issue that you might be able to

try to diagnose yourself and this is the case of a stuck or failed EGR valve. It is beyond the scope of this article to explain how to check

your EGR valve, but it’s something to look into if your car has a chronic ping problem.

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