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because the high octane fuel prevents the igniting of fuel before the starting of engine
Plus (89 or 91 octane) will nor harm the engine or fuel system on an engine thats call for 87 octane.Plus (89 or 91 octane) will nor harm the engine or fuel system on an engine thats call for 87 octane.
High Octane fuel is highly refined fuel which is often used by the aircrafts and jet airliners. Therefore, such fuel will definitely help you to lower down the engine vibration.
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.
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.
The correct octane fuel for a 1998 Subaru Legacy is RON98. This is the right octane to be used based on this car's engine for best performance.
It calls for 91 octane fuel. However the engine does have a know sensor so it will adjust ignition timing to keep from damaging the engine if a lower octane fuel is used.
It is not preferred or recommended it is required or you will do damage to the engine. Premium fuel of 91 Octane is required and must be used.
Regular 87 octane.
Check your owners manual for fuel recommendations. Unless the engine has a high compression ratio, it will not benefit from higher octane fuel.
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.