Quote:
Originally Posted by embryoguy@mac.com
How is the factory mobil one oil inadequate? Im sorry but I'm going to stick with that Porsche uses.
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Oil formulations change to meet changing market requirements. Oils recommended by manufacturers are frequently dictated by CAFE standards. They don't care if your car wears out, they care that their fleet hits a target MPG. Oils too can change formulation over time to match newer car engineering demands. The "Mobil 1" you buy today may not be your fathers Mobil 1. ExxonMobil has no obligation whatsoever other than market pressure, to keep their formulation the same. Are you familiar with 2003 Mobil 1 formulation versus to 2014 formulation? Me either. The designer oils don't have these market constraints and can be tailored to do things like reduce wear at the expense of fuel mileage.