90 Octane And 95 Octane

[karavita]

Hi friends,

This may be a basic question for you all. But the truth is person like me not aware these basics.

Could you ple explain the difference between 90 octane and 95 octane?

What should be the best for 10 years old car?

Thanks lot!!

[The Don]

http://www.chemistryexplained.com/Fe-Ge/Gasoline.html

The article above will explain the issue of the octane figure better than I could.

Whether you should use 90 octane or 95 octane depends on the engine, rather than the age of the engine.

some engines are built to take higher octane fuel, and thus if you provide it with a lower octane fuel, there tends to be certain amount of knocking as a result, and sometimes loss of power.

But if the manual of your car does not recommend the use of high octane petrol and your car is running fine without any issues, there is no reason to switch from 90 to 95 octane.