Changing the oil chemistry of such an expensive engine with additives is not something wise for the amateur.
There are seal materials, viscosity, flashpoint and other things to consider and I'll bet using such products would void your engine warranty if you had one.
Just stick to the Porsche approved oils list and you will be fine. Adjust viscosity slightly for your local conditions.
Porsche-Approved Oils
As far as the magic chips go, if they are really good, you'd hear about it in these forums and nearly everyone would have one.
I think there may be some in the ~$1000 price range that could help you if you actually have done some serious performance mods and you need the ECU
to take advantage of additional air/fuel flow to increase the power.
The cheapo chip effects are typically nulled out by the existing ECU as it attempts to restore the effects back to its programmed parameters.
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"It broke because it wants to be Upgraded
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2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)