Does using high octane gas have an advantage in higher altitude?

Question:


Answers:

Changing a tire, but the lug nuts are on too tight.?

No.

Some times wen i turn my car off n then try to turn it back on it wont start why?

In modern engines, the air/fuel ratio is controlled to be optimal at all reasonable operating altitudes. Higher octane is required to prevent engine ping or knock. Many modern engines can take advantage of higher octane by advancing the timing and get better performance than with lower octane. Check your owner's manul. There is no advantage to using higher octane than that recommended by the manufacturer.

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I am trying to find some info on a 5hp briggs and srtatton model #135212?

no. higher altitudes actually require less octane

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Fuel pump, filter or else?

Nope. In fact, you can use lower octane at higher altitude because of the lower air pressure. A lot of stations over 4,000 ft sell 86 instead of 87 for regular.

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