Does EPA have curves showing the effects of different oxygenate levels on the resulting T50/T90?

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The Agency has developed no such curves. However, since the Complex Model requires the use of E200 and E300 instead of T50 and T90, the effects of different oxygenate levels on E200 and E300 can be back-calculated from the resulting dilution of the base gasoline.(7/1/94)

This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (PDF)(333 pp, 18.17 MB, EPA420-R-03-009, July 2003, About PDF)