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skirts
I think the air is going to like what you've done.
I do have a reservation with respect to the premium fuel.
Unless you have some extreme pinging problem( shouldn't if timing is correct and some amazing carbon deposits have increased the compression ratio ) which prevents normal acceleration,the premium should show no change to mpg,as with the exception of octane rating,it has the same chemical energy content as any garden variety regular-unleaded fuel.
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