IS HIGH OCTANE WORTH THE COST?
Folks have been asking me about octane ratings. They want to know if high octane gasoline will give them better mileage.
There seem to be some confusion about what the octane rating is and what is does for us.
The basic fact is that the design of the engine is the only thing that determines what octane rating gasoline you need to use. The higher the compression ratio your engine has the higher the octane it needs. It is a hardware thing.
If you are trying to run your vehicle with gasoline that has too low of an octane rating, you will loose power and your engine will make banging, knocking noises. Those noises mean the air fuel mix is igniting on its own, not when the spark plug sparks. The engine runs poorly and maybe damaged if this is allowed to continue.
The instruction book that came with your vehicle will tell you what octane rating fuel you need. If you lost the book ask your car dealer.
Higher octane fuel is not better, it is just different. High octane gasoline does cost more because there are extra steps needed to make it.
You can use higher than needed octane gas but it will cost more to buy and your miles per gallon will likely be reduced. If you do not need it, buying higher octane gasoline is throwing your money away.
If you car engine is made to use regular 87 octane and it is knocking the problem is likely due to the spark timing being out of adjustment. Get your engine tuned up and your cost per mile will go down.
Using higher octane gasoline than you cars needs WILL NOT boost your mileage.
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