U.S. diesel sales grew by more than 27% in 2011, and auto industry officials predict another large increase in diesel sales in 2012 as the number of auto manufacturers add the technology to their product lineup. Diesels accounted for more than 3% of the U.S. automotive market last year, with all battery-electric, plug-in and conventional hybrid models combined generating just over 2%. Analysts caution the demand for diesels may not continue to outpace that for hybrids in 2012.