Deconstructing myths: my car runs more with 98 octane petrol

“My car go more with 98 octane petrol”. I am sure you have heard this phrase at some point, and maybe came out of the mouth of someone with a simple utility of 75 horse power. The 98 octane petrol is the best petrol we can put on our car, but we must not forget that its price is up 15 cents per litre higher to the conventional gasoline of 95 octanes. does it really worth refuelling with petrol of 98 octane rating compared to gasoline of 95 octanes? we Dismantle the myths about gasoline more expensive.

What is octane? Where are the 3 octane difference?

Currently, in Spain it sells gasoline of 95 and 98 octane. In other countries can be found with gasolines of lower octane rating.

The octane rating of a fuel is its resistance to the autodetonación, the auto-ignition. The 98 octane petrol is more resistant to auto-ignition than the gasoline of 95 octanes. In the inside of an engine is subjected to the mixture of gasoline and air to enormous pressure, in a space of a extremely short time. During the compression cycle, the mixture of fuel and air should be turned on at the right time: neither before, nor after. Why should I want this? Because each engine has a compression ratio different.


What is the compression ratio of the engine?

compression ratio of an engine, technically, it is the proportion by volume in which is compressed the mixture of air and gasoline in the interior of a gasoline engine. “How compressed is the mix”, in short. If our engine has a compression ratio very high (10.5:1 onwards), it is very possible that the manufacturer of the car recommends that you use 98 octane petrol. The gasoline of octane lower than it might explode before time, causing problems in the combustion.

are you Going to notice my car? Depends on your car

it Is estimated that the performance and consumption of an engine improve by about 3% using 98 octane petrol.

atmospheric powerful or high-performance engines tend to have the most high have their compression ratios. Are the ones that really take advantage of the 98 octane petrol, and the ones that really need it to work properly and to extract the maximum performance. The greater part of conventional cars recommend the use of gasoline of 95 octane, and you don’t notice differences at the level of performance using 98 octane petrol. If you notice that your utility 90 HP anda more, for the most part… it is suggestion.

ahorrar-en-gasolina-4If this is your case, don’t spend more money of the account when you refuel your car. But if your car recommends the use of 98 octane petrol, is that you have to use. Your car can run on petrol of 95 octanes, but you will notice that its performance is somewhat lower and consumption will be somewhat higher. To the point that you could override the savings of the lower price per liter. The sensor of chopped of the engine to delay the ignition of the mixture, due to the lower capacity to the autodetonación of gasoline of 95 octanes.

you won’t notice a performance difference between the petrol if your car recommends the use of gasoline of 95 octanes.

level of maintenance and long-term reliability, refuel systematically 98 octane petrol in an engine that has its recommended use is correct. It is not necessary to know the compression ratio of your engine to know what gasoline to take, you just have to open the fuel tank. In most cases, a sticker will indicate what type of gasoline is recommended. If the lid puts the gasoline of 95 octane is recommended, you roll the money repostando 98 octane petrol.

If you do not find the data on the reservoir cover, you’ll find it in the manual of the car.


And what about the additives that they put the oil? What is a fuel cleaner?

Is a completely different subject, but it is touching it tangentially. Generally, the oil companies add special additives to their gasoline, with the aim of differentiate them from those of other manufacturers. It really is the only difference that can be printed to a product completely standard. The 98 octane petrol is usually to carry additives that improve the performance of the engine, and even clean it up. What is certain is that your effectiveness scientific it is as little doubtful, and no company delves into their formulas publicly.

What is certain is that the fuel of 98 octane tends to have a certain amount of sulfur is slightly lower the fuel of 95 octane. It is marginally cleaner than the fuel of 95 octane and produces more efficient combustion. But again, your engine will not notice it unless you are prepared to do this. In the U.S., the majority of engines are prepared for operation with fuel of 87 octane, and the octane maximum publicly available is 93 octane. I let it fall.

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