EFI of course, and if you gonna ask me why, because 1. it was recognized as more fuel-efficient because it atomized the air/fuel mixture into a perfect cloud and didn't waste a single drop of gasoline, that's why it produce more power than carburated engine do 2. easy to maintain, no need to clean like some carburator powered car owners do (yun nga lang it is more complicated, difficult to install and repair at mahal ang replacement). 4.As related to what I say in no.1 fuel injectors boost gas mileage as well as power; lower gas emissions; and make the car easier to start in cold weather