Report by J.D. Power and Associates predicts hybrids and diesels to reach 9 percent of U.S. auto sales by 2009. A new report from J.D. Power and Associates predicts that conventional gas engines will remain dominant in the U.S. market for the near future, but that hybrid and diesel engines are steadily gaining market share. The report, “The Steady-But Slow-Rise of Hybrids and Diesels in the U.S. Auto Market,” says that hybrids and diesels will reach 9 percent of U.S. auto sales by 2009, with Toyota Motor Corp. holding the majority of sales. The report says that more than 70 percent of all new hybrid sales in the past two years have been Toyotas—thanks in large part to increased production capacity—but that the number is expected to decline to about 50 percent by 2009 as other automakers pick up the slack. The report also says that the consumer demand for diesels is growing, spurred by new, cleaner diesel engines combined with as much as 30 percent better fuel economy than a comparable gasoline engine, says the report.