[00:02] gasoline combustion engines over the past 50 years is arguably direct fuel injection. And unfortunately, it brought with it some problems. In 1975,
[00:14] over 95% of gasoline engines sold in America were carbureted. By the year America were carbureted. By the year 2000, nearly 100% of gas engines had made the switch to port injection. And by the year 2025, over 80% of gas
[00:28] engines are now using direct injection, thanks to the power and efficiency benefits. Most people are aware of the carbon deposit challenge that GDI engines face, since port injectors no longer clean the intake valves. But
[00:41] there are three other challenges: soot formation, which in turn can cause wear on timing chains, fuel dilution from DI engines directly spraying cylinder walls, especially for shorter trips, and LSPI, destructive behavior that stems
[00:56] from small turbocharged engines making more power at lower rpm, in part thanks to GDI. So, while the industry initially seemed to be abandoning port injection, it's made a comeback in combination with direct injection. Same logic as when I
[01:11] ask myself, should I cry in the shower or in my car? or in my car? Why not both?