Does the MP3-500 have a Knock Sensor, to enable it to use lower octane gas, such as 87? Anyone tried 87 for an extended basis?
Owners manual says to use 91 Octane, yet I'm presuming that it's like many modern vehicals which have the ability to sense pre-detonition (from use of lower octane gas), and adjust (degrade) the timing accordingly.
All things considered, I presume that there is a Negligible difference in Horsepower, between 87 and 91 octane... In which case, I'd rather pinch pennies and go with the cheaper/lower one.
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