Autos: GDI

Self-tutoring about autos: the tutor mentions GDI.

The following is according to my understanding.

GDI, or gasoline direct injection, is a much higher pressure injection system than plain fuel injection: perhaps thousands of psi for GDI, versus only around 40 to 60 psi with plain fuel injection.

While GDI can offer some advantages, a disadvantage can be that it sprays fuel at such high pressure that it can blow past the piston rings, so gasoline gets into the engine oil. Gasoline is a solvent, so it can dilute and thin the engine oil. It can set up a vicious circle: the diluted oil might make a looser seal around the piston, allowing more fuel to blow by from the GDI, and so on.

I’m not familiar with this, but learning of it, I looked up our two vehicles to see if they have GDI. I’m happy to say that, so far as I’ve learned, neither does.

Source:

Universal Technical Institute

YouTube: Scotty Kilmer: “The Big Problem with GDI Car Engines”