I saw a show on the history channel all the oil and gas comes from the same place and pipe lines, trucks etc, so I don't think it matters as long as you're using a reputable brand that synthetic.
Enjoy your blower, boost is fun. Unfortunately there are lots of cars out there mainly GM products and imports that will still handle your car or give you a god run for your money. However once your blown and you've got other mods thats where the car will really start to come together.
Again...