EcoTec

In a somewhat surprising move, the entry-level Malibu LS now comes standard with a start-stop system, the first midsize sedan sold in the United States that is so equipped. Combined with refinements of its base 2.5-liter four-cylinder engine and a new six-speed automatic transmission, the LS has a significant fuel economy increase compared with the outgoing model (now 25 city; 36 highway).