First of all I LOVE my Double Agent. Whenever the shot is sloppy it gives me traction better than any Storm ball I've ever owned. That said - if you are looking for more HOOK in oil don't get the Double Agent. It is a smooth arcing ball that does not turn the corner as good as the Special.
If you want a Storm ball that will give you traction in heavier oil and turn the corner nicely get either a Passion, Attitude, or T-Road Solid. Personally I just ordered an Attitude for that use.