Fuel Mythbusters
1. Myth: Higher octane fuel burns faster.
False!
Higher octane does not burn faster, it is the fuel's resistance to burn. Higher compression and cylinder pressure require a higher octane fuel to control detonation and preignition.
2. Myth: Aviation fuel is the same thing as racing fuel.
False!
Aviation fuel is a high octane, around 102 or 103, but has a low lead level and is formulated for a higher altitudes and low rpm. It should never be used in a high performance automotive engine.
3. Myth: Putting high octane race fuel in a stock or lower compression engine will make more power.
False!
The octane needs to be matched to the engine's compression ratio and rpm. Too high an octane can actually hurt performance in the wrong engine.
4. Myth: Using racing fuel in a street car can cause damage.
True! (in most cases)
In computer controlled cars, leaded race fuels can foul O2 sensors but unleaded racing fuel is fine. The higher octane will not hurt the engine but the lead will kill the sensors over time.
False!
Higher octane does not burn faster, it is the fuel's resistance to burn. Higher compression and cylinder pressure require a higher octane fuel to control detonation and preignition.
2. Myth: Aviation fuel is the same thing as racing fuel.
False!
Aviation fuel is a high octane, around 102 or 103, but has a low lead level and is formulated for a higher altitudes and low rpm. It should never be used in a high performance automotive engine.
3. Myth: Putting high octane race fuel in a stock or lower compression engine will make more power.
False!
The octane needs to be matched to the engine's compression ratio and rpm. Too high an octane can actually hurt performance in the wrong engine.
4. Myth: Using racing fuel in a street car can cause damage.
True! (in most cases)
In computer controlled cars, leaded race fuels can foul O2 sensors but unleaded racing fuel is fine. The higher octane will not hurt the engine but the lead will kill the sensors over time.
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