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Octane is a measurement of the combustion process. Most commonly you will see "85 87 91" octane ratings on your average gasoline pump, this of course indicates the amount of octane that, that specific product contains.
The only purpose of octane is to resist detonation. What this means is that a higher octane gasoline is actually more stable than a lower rated fuel. When any kind of fuel is subject to high pressure and high heat (just like you'll find on the compression stroke of an average automobile) it becomes unstable and in some cases will spontaneously combust without an ignition source, this is called "detonation" which will make your engine sound like it's "knocking". Vehicles requiring a high octane fuel most often have engines with higher compression ratios which of course cause higher heat and higher pressures. Most common vehicles only require an octane rating of 85, octane ratings of 87 and 91 won't make your car run any better.
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Is it OK to use regular gasoline in a high-compression engine?
My advice is to use exactly what the manufacture recommends on any older car. Using 87 octane in an engine that requires 91 octane will cause pre-detonation (pinging) and will eventually cause engine damage on older vehicles. On newer vehicles where the manufacture says, premium fuel recommended you can use 87 octane fuel. The fuel management system will adjust for the lower octane fuel. You will have a slight loss of power but no other problems. On vehicles were the manufacture say's premium fuel required you must use premium or you will damage the engine over time.
Can you run 13 to 1 compression on 104 octane?
cars & vehicles
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.
Is high octane gasoline better?
Higher octane fuels are used for most luxury cars that run hotter to get more out of the engine. It is also used for older vehicles that cannot handle the gunk from lower octane fuels.Added: The "experts" say that it is a waste of money to use high-octane premium fuel in those engines whose manufacturers do not call for it.
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.
What is the octane rating of a Lexus?
Lexus vehicles run best on 93 octane or better. you'll probably get pinging below that, especially on hard acceleration.
Is octane use?
Octane has not special application excepting the so-called octane number.
What octane fuel do I use in a Chevrolet suburban?
87 octane
Will too much gas octane mess with your car?
It shouldn't. Most production vehicles built from 1990 to date, have a "knock" sensor which accommodates different octane levels.
What octane does a 2001 Dodge Ram use?
you should use the medium rating octane(may vary depending on station)but usually 89 octane
What octane rating does a Dodge Intrepid 2001 use?
You can use either octane range of 87 to 89. But Daimler-Chrysler recommends to use 89 octane for optimum performance.
What fuel octane does a 1986 El Camino use?
87 octane
