Originally Posted by bobwilson1977
There's quite a few new gas engines that are now using HCCI ( high compression direct injection) This is similar to what you find in turbo diesels. Some of the newer crossovers from GM are getting 30MPG now, and these are vehicles that used to get maybe 15-20MPG. These are V6 engines too. Additionally, these engines have more torque and power in relation to their weight. So that means that yes, we could realistically have better fuel economy and get to keep the power too. I suspect this move will actually be better for US car companies in the long run since if you look at what GM and Ford are doing these days, they actually make more fuel efficient cars and trucks, plus GM has the Volt coming out next year.
It'll be intersting.
Direct injection is awesome. The engine can run higher compression on standard octane and at cooler temps. The end result is more power, better fuel economy and less emissions. It is more expensive to produce than standard multi port, because among other things, it requires a secondary high pressure fuel pump. I think the benefits outweigh the expense and DI will probably start showing up on more and more vehicles.