The dollar has been relatively stable for about two years now against the major currencies (excepting the Franc - but thats been pegged since last summer) ...
check this: Historic Exchange Rates
Enter the EUR, CHF, GBP and go back two years ...
You can add Yen too, but that flattens the others ...
What this article is, is an attempt by Forbes to rationalize retail pump prices for gasoline, and they're not even using any standard measure of inflation to do it, since that metric does not support it, and neither does exchange rates.
But, off to the races we go. Gas jumped because Iran is rattling sabres and because refinery capacity is lacking, nothing else. The price per barrel for crude is nowhere near the level of summer, 2008, but retail is equal to it and still climbing.