Quote:
Originally Posted by tjkamper
The higher altitude means that a lower octane is required. The 87 octane is based on being at sea level. Also the gas in UTAH is 10% ethenol, this technically increases the octane. I've run both 85, 87 and 91 with no noticable differences.
Put in some 85 and see how it goes. If you notice that the engine starts to ping (knock) then put in some 87 to see if it goes away. If it goes away then you know that 87 is needed.
I've had no problems with 85 and I usually run 85, because I get cheap gas at costco (Costco only has 85 and 91 here in Utah).
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Cool. I'll give it a shot. I'm not really sure though if I would recognize knocks and pings as I've never heard them before or at least recognized them.