BlackFerret69
Well-Known Member
I don't use anything but 93 octane in my '06 GT. But it is tuned for it.What is tthe butt dyno performance effect? I am planning on using high octane, since the price difference is minimal to me, but I can undersand if saving a 100 to 200 bucks a year is significant.
https://www.automotivist.com/is-93-octane-worth-it/
One other thing to consider. All things being equal (Mainly driving style), gas mileage usually increases with higher octane fuels.
But that small gain may be mitigated by the heavy right foot, LOL!!
In my case, I average 17-20MPG City, 25-28MPG Highway. That all depends on how many smiles per mile I am having.
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