This is probably a dumb question, but what does running 93 Octane do on our cars that 87 Octane doesn't do? This is one thing I never understood?

Octane is fuel's ability to retard premature detonation or "knock". Essentially, cars have 4 stroke engine's where the fuel/air mixture is compressed in the engine chamber before it's ignited by the spark plug.

Detonation typically can occur by accident when the fuel/air mixture is compressed and combusts because of the pressure.

Higher compression racing engines, which compress the fuel/air more, are more prone to detonation. That's why they run racing fuel (104 or even 110 octane). The fuel isn't more powerful, rather it's won't detonate prematurely. The higher the octane # the more protection against detonation. Running 93 octane in a car designed for 87 won't do any damage.

Octane is fuel's ability to retard premature detonation or "knock". Essentially, cars have 4 stroke engine's where the fuel/air mixture is compressed in the engine chamber before it's ignited by the spark plug.

Detonation typically can occur by accident when the fuel/air mixture is compressed and combusts because of the pressure.

Higher compression racing engines, which compress the fuel/air more, are more prone to detonation. That's why they run racing fuel (104 or even 110 octane). The fuel isn't more powerful, rather it's won't detonate prematurely. The higher the octane # the more protection against detonation. Running 93 octane in a car designed for 87 won't do any damage.

:iagree: Good post

Nice post Tom!! Have you had any experiance with the E85 yet?? What are your thoughts on it?

Greg.

Nice post Tom!! Have you had any experiance with the E85 yet?? What are your thoughts on it?

Greg.

No experience.

Octane is fuel's ability to retard premature detonation or "knock". Essentially, cars have 4 stroke engine's where the fuel/air mixture is compressed in the engine chamber before it's ignited by the spark plug.

Detonation typically can occur by accident when the fuel/air mixture is compressed and combusts because of the pressure.

Higher compression racing engines, which compress the fuel/air more, are more prone to detonation. That's why they run racing fuel (104 or even 110 octane). The fuel isn't more powerful, rather it's won't detonate prematurely. The higher the octane # the more protection against detonation. Running 93 octane in a car designed for 87 won't do any damage.

Thanks for the 411, I have always wondered and just never taken the time to ask. Every time at the pump recently I have to admit I wonder, and curious would it hurt to run the 87 in the car? :smack:

This is probably a dumb question, but what does running 93 Octane do on our cars that 87 Octane doesn't do? This is one thing I never understood?

The 93 Octane cost more :rofl: , Looks like your question got taken car of, when I read the question , had to reply with a little humor. :cheers: