Quote:
Originally Posted by fumanchu1
WTF you can't go at sea level??(I'm puzzled by that statement).
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I don't think anybody ever responded to this. Altitude has an effect on the octane required. Because the air is less dense at higher altitude, the engine is less susceptible to knock. As a result, you can use a lower octane gasoline at high altitudes with any detrimental effect on your engine. If you ever go up to Taos, Santa Fe or Los Alamos (around 7000' elevation), "regular" gas is 85 or 86 octane, and at some stations the highest you can get is 89.
The opposite is true going down to sea level, where you'd need a higher octane for the denser air. If go_a_way1's location is correct, he lives at an elevation of about 3400'. If he's tuned for 94 and it's as limited as he says, he might need 96 or 97 octane at sea level to avoid knock. Since you can't buy that at the local corner station, he might have some problems.