Tyranthraxus posted...
No they don't. Look in your driver's manual and it will tell you what octane you require.
Engines use a kind of bicycle pedal looking contraption to pump cylinders. When one goes up the other goes down. The speed at which this happens is regulated by the octane of the fuel based on the engine specifications. In order to actually work as intended, the engine expects a specific octane of fuel. If you don't get it, you get what's called a misfire which is where two cylinders try to go up at the same time. If this happens too often your engine breaks.
Read the driver's manual of your car to figure out what octane you need and use only that octane.
So it's like, some octanes are better for some cars, or is it a tiered list where the highest octane is best for all cars. And is it just a matter of putting the right octane means not need to take the car to the garage as much?