91 octane, unless you back off the stock base line timing then you could run lower.
The 1988 Porsche 944 is designed to run on premium unleaded gasoline with an octane rating of 91 or higher. Using a lower octane fuel can lead to engine knocking and reduced performance.
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The octane rating of gasoline is determined by conducting a test called the Research Octane Number (RON) test. This test measures the fuel's resistance to knocking or pinging in an engine. The higher the octane rating, the better the fuel is at resisting premature combustion, which can cause engine damage.
15-25 Ron
I have a 1988 Corvette and it has a 20 gal. capacity
91 Octane Premium Fuel. Use nothing less or nothing higher.
Ford recommends regular unleaded for this vehicle. 87 octane fuel.
Use 87 Octane Regular.
Airplane fuel typically refers to aviation gasoline (avgas) or jet fuel. Aviation gasoline, commonly used in piston-engine aircraft, usually has an octane rating between 100 and 130, with the most common type being 100LL (low lead), which has an octane rating of 100. Jet fuel, such as Jet A or Jet A-1, does not have an octane rating because it is a kerosene-based fuel used in turbine engines, which operate differently than piston engines.
The 1999 Infiniti Q45 is designed to run on premium unleaded gasoline with an octane rating of 91 or higher. Using fuel with a lower octane rating can lead to engine knocking and reduced performance. For optimal performance and efficiency, it's recommended to adhere to the manufacturer's fuel specifications.
When you mix regular unleaded fuel and unleaded plus fuel in a gas tank it results in a mixture of fuel with an octane rating higher that regular unleaded fuel but lower than the octane rating of unleaded plus fuel.
The 1982 Yamaha SS440 snowmobile typically requires fuel with an octane rating of at least 87 (regular unleaded). However, for optimal performance, using fuel with a higher octane rating, such as 89 or 91, is often recommended. Always refer to the owner's manual for specific fuel recommendations and guidelines for your model.