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Octane cannot be seen, but it is of utmost importance when it comes to gasoline. One thing for sure, higher octane fuel costs a lot more. Simply put, octane is a measure of gasoline's ability to resist detonation, which you hear as pinging and knocking in your engine. The higher the octane the more the fuel can be compressed without detonating before you want it to. Detonation, ping, knock, whatever you want to call it, occurs when the air/fuel mixture ignites before the spark plug fires. The mixture ignites from compression and not from the flame of the spark plug. In other words, the higher the octane the less likely it is to ignite prematurely. The only benefit to a high octane fuel is that it allows an engine to run at a higher temperature and with a higher compression ratio without pinging.

Higher octane fuel does not provide more energy, more power, better mileage, more torque, burn cleaner, clean your engine, and is not better for the environment. If the engine is pinging when using the correct octane fuel, then it may be necessary to move to the next higher octane to prevent pinging, and damage to your engine, unless there is another problem. If you are using higher octane fuel for any of these reasons, STOP, you are throwing your money away.

Also, never use a lower octane fuel than is recommended by the manufacturer. If the manufacture recommends 89 octane then use 89. If they recommend 87 then use 87. The key is knowing what was the engine designed to run at to achieve optimum performance and mileage. One exception is when you are towing a heavy load with a vehicle designed to run on 87 and you experience pinging. In that case it may become necessary to switch to 89 while towing.

In conclusion, race car engines are designed to run on high octane fuels due to their high compression engines. You cannot make your engine a race engine just by upping the octane. Save your hard earned money, and use exactly the octane you need.

<<>> Octane C8H18 can be mixed with heptane C7H16 to form petrol (gasoline). Heptane being a less-heavy molecule has a lower ignition temperature. An octane rating of 95 gives the same ignition temperature as a mixture of 95% octane and 5% heptane. Higher-octane fuel detonates at a higher temperature.

High-octane fuel can be used in an engine with a higher compression-ratio to produce more power. The extra power comes from the compression ratio and the higher thermodynamic efficiency, rather than any change in the chemical energy in 1 kg of fuel.

In earlier days high-octane petrol was reserved for aero-engines so motorists had to use the lower octane stuff and tolerate an engine with a lower compression ratio producing slightly less power for its cubic capacity.

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Q: What are the effects in the engine when using high octane gas?
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What are the effects of octane rating?

Simple, If you engine requires 91 octane, and you put 87 in it, you will experience a degradation of engine performance, due to the lower octane having faster burn properties. If your engine requires 87 octane and you put high octane (90-91 octane) fuel into it, you will NOT see a performance boost, and may even see a slight decline in performance. What 99% of all people don't know is that High Octane fuel actually burns more slowly, than lower octane fuel. This property, allows higher compression prior to detonation, hence more performance at combustion.


Why does a high octane fuel has a less tendency to knock in automobile engine?

because the high octane fuel prevents the igniting of fuel before the starting of engine


Which is better 87 octane or 93 octane non ethenol gas?

There is no better. If your car is designed to run on 87 octane then using 93 octane is a total waste of money. The higher octane will provide no more power, no better fuel economy, and is of no benefit to the engine whatsoever. In fact using a high octane fuel in an engine designed for 87 octane may actually cause hard starting. Use exactly the octane as recommended by the manufacturer of the vehicle. Saying that, if your car is designed to run on 93 octane then using 87 octane can be detrimental to the engine due to pre-detonation that will be caused by running the lower octane fuel. It depends on whether the manufacturer recommends the use of higher octane fuel or says it is mandatory. Most vehicles built in the last few years where 93 octane is recommended can run on 87 octane with a slight loss in power. The engine fuel management system will adjust for the lower octane and there will be no harm to the engine. The bottom line is to use exactly what the manufacture recommends.


Why high octane petrol gives more mileage?

High octane gasoline (petrol) only provides better fuel mileage in vehicles that require the high octane. In a normal engine running higher octane provides no benefit.


Should you use premium unleaded instead of regular unleaded for your 2004 V-6 Ford Mustang?

No, the V6 Mustang was designed to run on Regular Unleaded. Using Premium fuel is of no benefit whatsoever. Higher octane fuel does not provide more energy, more power, better mileage, more torque, burn cleaner, and is not better for the environment. In fact your engine may very well perform worse on a high octane fuel. High performance engines are designed to run on high octane fuels due to their high compression. Your V6 is not a high compression engine and you cannot make your engine a race engine just by upping the octane. Save your hard earned money, and use exactly the octane you need. Using a Higher Octane is a waste of money unless you have a car that requires it.


Does higher octane produce higher co?

Higher octane is helpful for high compression engines. High compression causes the combustion to take place faster and can cause pinging and a loss of power. By using high octane with high compression you get the advantage of the extra efficiency of the high compression engine and the delivery of the combustion across the power stroke of the piston, with out pinging.


87 and 91 gas?

Use exactly what your owner's manual lists. Using a higher octane than your engine was designed to burn, will provide no benefit whatsoever. No more power, no better mileage, and in fact can provide poor starting, and in some cases, harm the engine. Besides the fact you are paying more for high octane fuel you do not need. Using a lower than required octane can cause less power and pinging. This can eventually do damage to your engine. It is a myth that a higher octane fuel provides any benefit to an engine not designed to use the higher octane.


Does the Chevrolet Cruze turbo require high octane fuel?

put the 92 octane for keep your engine clean and for the turbo engine 1.4 not 1.8 the 92 is the best performance at 4000 rpm high


Does high octane gas increase mileage?

Not unless the engine using it was specifically designed for it. Gas mileage takes many things into consideration, and if a car is designed to use standard octane gas, the use of high octane gas will not increase the car's mileage - it is just a way of figuratively blowing dollar bills out of the tailpipe.


Can you run high octaine fuel?

It depends on the type of engine and how high of octane you are running. Octane slows the burning of fuel, so if it is too high of octane for the engine, you will end up burning out your exhaust valves because burning fuel is being pushed out of them. 92 or 93 octane that is available at fuel pumps as "premium" fuel is ok for most engines. I wouldn't run anything over about 100 octane.


What happens if you use high octane fuel in a high compression engine?

It runs. High octane is what is required by high compression engines in order to prevent pinging. Unless you put the hi octane fuel in the oil filler. Then it will only briefly run before it explodes.


What is the English name for engine oh birca?

High Octane Megazord with Tail Spinner