This presentation will begin with a discussion of how engine oils are formulated from base oils and several types of additives. Relevant engine oil specifications (ILSAC, API and dexos), including engine and bench tests, to which these formulations will be qualified, will then be covered. Each of the tests will in turn be reviewed as to their appetite for additives and/or base oils. There will also be discussion of expected future needs, and how these will likely impact engine oil formulation.