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In sweden we only have 95 and 98 octane and both have 5% ethanol, 10% is coming next year.
And 10% ethanol is Not Bad for 996/986.
But pure 91,5 octane sounds strange.
95 is the lowest a Boxster should be running on over here.
On the side note, it would be fun to see how much difference it would be with pure ethanol!!
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