87 or 93 and What Brand? - Page 6 - 2017 Ford Fusion V6 Sport Forum
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post #51 of 56 (permalink) Old 08-16-2019, 10:22 AM
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My OAR is -1 and inferred octane is 98.
I use Grocery Store 93 octane, which comes off the same truck that delivers fuel to Costco (Top Tier) gas stations.

* 2017 Fusion Sport, 12.7 @ 108 mph tune-only (early tune of mine, bad trans settings), full trunk w/ lunch, and dirty paper air filter
* 2014 SHO non-PP, 12.4 @ 111 mph tune-only, all day long with dirty paper air filter and worn out 30k RS-As
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post #52 of 56 (permalink) Old 08-16-2019, 10:54 AM
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i get my 93 from mobil up here where i live, when i go to visit my hometown its always 93 from shell... but thats because there isnt any mobil stations in my hometown
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post #53 of 56 (permalink) Old 08-16-2019, 11:00 AM
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Metroplex - what do you mean inferred octane? Are you running some mixture of octane booster or ethanol with the 93?
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post #54 of 56 (permalink) Old 08-16-2019, 11:04 AM
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One of the PIDs I monitor is for inferred octane and that is what I see.

* 2017 Fusion Sport, 12.7 @ 108 mph tune-only (early tune of mine, bad trans settings), full trunk w/ lunch, and dirty paper air filter
* 2014 SHO non-PP, 12.4 @ 111 mph tune-only, all day long with dirty paper air filter and worn out 30k RS-As
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post #55 of 56 (permalink) Old 08-16-2019, 11:19 AM
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I don’t think that’s an option with the datalog files on my SCT BDX.
What are you using to monitor parameters?
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post #56 of 56 (permalink) Old 08-16-2019, 02:12 PM
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I'm running HPTuners. I believe I had those parameters available even for my 2014 SHO.


To answer the OP's question, I ran 87 in the Fusion Sport for quite a long time. The OAR was +1.00 and inferred octane was something like 86 or lower (I remember it being lower than 87). Not very good for performance.

* 2017 Fusion Sport, 12.7 @ 108 mph tune-only (early tune of mine, bad trans settings), full trunk w/ lunch, and dirty paper air filter
* 2014 SHO non-PP, 12.4 @ 111 mph tune-only, all day long with dirty paper air filter and worn out 30k RS-As
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