It got fixed and here is what happened:
The mechanic changed the spart plugs and it did no good. Then he borrowed a coil pack and started swapping it around and it did no good. Then I told him again what happened again, reminding him that the problem started within 5 miles of adding the Gumout, so he put something in the tank called CFoam (or Sea Foam). Within 5 miles, the problem was gone.
That whole exercise cost me $300.00. Guess what I think of Gumout
Thanks Everyone!
PS - The car did run out of gas on Thanksgiving day.