Using Corn Syrup as a primer

Has anyone used Corn Syrup as a primer? What are the pros and cons of using that instead of corn sugar?

 

Corn syrup from the grocery store has additives you may not want in your beer - vanilla for one. It's not pure dextrose either. From Karo's web site:

What is corn syrup?
Corn syrup is a mildly sweet, concentrated solution of dextrose and other sugars derived from corn starch. It is naturally sweet. Corn syrup contains between 15% to 20% dextrose (glucose) and a mixture of various other types of sugar.

What is the difference between Karo light and dark corn syrup?
Karo light corn syrup is a mixture of corn syrup and high fructose corn syrup (to provide increased sweetness) and is flavored with salt and pure vanilla. It is clear and colorless, with a moderately sweet flavor.
Karo dark corn syrup is a mixture of corn syrup and a small amount of refiners' syrup (a cane sugar product with a molasses-like flavor). Caramel flavor, sodium benzoate (a preservative), salt, and caramel color are added. Dark corn syrup has a rich brown color and distinctive flavor.

 

Funny thing is that I have a coworker who goes on and on about corn syrup being in everything. It would be amusing (to me at least) to give him some beer made with corn syrup )

I wonder how much it would take to prime a 5 gallon batch...

 

at least 4 oz.