View Poll Results: OPTIMUM 525 EFI Performance
87 OCTANE
35
74.47%
89 OCTANE
8
17.02%
91 OCTANE
3
6.38%
93 or HIGHER
1
2.13%
Voters: 47. You may not vote on this poll

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Which OCTANE fuel provides the best performance in your 525 EFI's

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Old 09-30-2005, 10:28 AM
  #11
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Default Re: Which OCTANE fuel provides the best performance in your 525 EFI's

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Originally Posted by nitro/max
I have the 525EFI, 87 works best. I think mobil 1 one V-twin or the mobil 1 15-50 weight is best. Seems to burn less oil and keeps oil pressure higher when hot.
We are running MOBIL1 15W-50 as well....so far no issues
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Old 10-01-2005, 07:55 AM
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Default Re: Which OCTANE fuel provides the best performance in your 525 EFI's

I've run Mobil 1 15w50 since 1996, no issues.
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Old 10-01-2005, 09:37 PM
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Arrow Re: Which OCTANE fuel provides the best performance in your 525 EFI's

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Originally Posted by LIOPA
YUP....that on going SYNTHETIC debate......Heard the same from Mercury as well about some oil pressure problems with it.

All Mercury will say is they know a lot of their "High Performance/Racing Customers" have Amsoil 20W-50 Severe Service Racing Synthetic Oil in their pans. Wonder why?

Getting them to give their Papal Blessing that it's ok to use synthetics is a joke...

Last edited by Hydrocruiser; 10-01-2005 at 09:43 PM.
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