The OPs theory has lots of merit.
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Outsource as much as possible at every manufacturing site.
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Optimize the Chemical plant footprint (only low cost countries that have low environmental compliance) will remain (China).
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Sell off any and all manufacturing sites in higher cost countries (Europe, Canada, etc)
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Package up the Mobil brand and sell it, possibly along with Lubes plants (while locking in some long term supply contracts to provide crude, etc)
Not a matter of if this happens, just how quickly. The upcoming US election may cause the company to pause momentarily, but as quickly as buyers are found and markets allow deals, pieces will be gone.
That's how you achiever Billions in cost savings... Check the charts folks; the fun is just starting.