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All I have gotton from running higher octane than 87 is added soot on the back of the boat, I will put some 91 the first tank of the season to add to last years fuel to compensate for octane loss from sitting.
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Originally Posted by Turbojack
(Post 3466011)
I may have the wrong motor. I think this motor runs slower with 93 then 87. The ecm would run the motor just before detonation. With 93 the ecm would not see any sign of detonation from the knock sensor and would think the knock sensor was bad, and run with reduce timing, thus giving less performance that 87 octane.
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Originally Posted by onesickpantera
(Post 3468332)
So you're saying when there is no knock the ECM pulls timing because it thinks the sensor is faulty??? :confused:
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87 octane for those engines.
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Originally Posted by JMS322
(Post 3465298)
There is NO advantage to running premium 93 octane fuel in an engine that calls for 87 octane. In fact it is proven that it may even produce less hp than the 87 octane, therefore may be a tad slower. It does on the other hand smell a lot better.
All higher octane will do is make your transom sooty from not burning as completely. |
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