GM’s Ecotec 2.4L I-4 has been awarded by Auto World magazine’s 2010 as “10 Best Engines” for North America. If you have been following GM cars lately, you can see that most of GM’s fuel economy cars are equipped with an Ecotec 2.4L engine. From the small compact cars to SUV that are equipped with this Ecotec 2.4L engine. What is so special about this engine? Well, for starter, it is a very fuel efficient engine that can get up to 32 miles per gallon on the highway from such vehicle like the GM Equinox.
This fuel efficient comes from the redesigned of the fuel injection system. Instead of conventional fuel injection which mixed fuel with air before going into the combustion chamber, the Direct Injection in the Ecotec engine works with the variable valve timing to inject the right amount of fuel to air ratio directly into the combustion chambers. This is not only optimized the fuel used but also cools the cylinder head to get extra power from the engine.