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GM DEXOS oil
Posted to Industry Issues Forum on 7/22/2009 46 Replies

The GM product that will meet the new GM GEOS-A oil specification will be marketed as Dexos-1. The GM product that will meet the new GM GEOS-B oil specification will be marketed as Dexos-2

So, Dexos-1 is GEOS-A approved and Dexos-2 is GEOS-B approved.

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