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87 vs 91

Zero7ST

New Member
Law Enforcement
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Location
Canada
Vehicle
2018 mustang 2020 ST
#1
Which octane of fuel do you run?

I believe the manual states run 91 or you will experience a decrease in performance.
 

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Nevada
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2020 Ford F-150 Raptor
#2
The decrease will be very minimal. I still like yo run 91 especially once we get the FPP tune.
 



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