Be Honda - known for reliability
Want to have best fuel emissions
But what do?
Solution: EARTH DREAMS(TM) TURBO DIRECT INJECTION
They don't mix air and fuel and push it through the air intake valve like a normal engine, but instead use a high pressure fuel pump to inject the fuel directly into the cylinder via an opening just for fuel. This gains fuel efficiency, and then they also make the engine smaller (like 1.5L instead of 2.1), and make up for it being smaller by putting a turbo on it. Voila, TDI.
What they didn't anticipate, was that in cold climates the computer will dump a lot more fuel in when cold starting and for a few minutes after, but this extra fuel at high pressure ends up making its way past the cylinders and into the oil galleries, causing the oil level to rise and weakening its ability to keep the engine cool. This isn't as bad an issue in warm climates since that fuel will end up burning up before mixing with oil. Also if you take short trips, it pretty much guarantees the fuel wont burn up since the engine will never warm up quick enough.
They also didn't clue in that in a regular engine, the fuel when mixed with the air acts as a cleaner for the intake valve. Now that there is no fuel and just dirty air, the valve becomes dirty over time and will eventually need to be repaired.
None of the base model hondas have this type of engine, and have the regular 2L engine that is super reliable.
Be Honda - known for reliability
Want to have best fuel emissions
But what do?
Solution: EARTH DREAMS(TM) TURBO DIRECT INJECTION
They don't mix air and fuel and push it through the air intake valve like a normal engine, but instead use a high pressure fuel pump to inject the fuel directly into the cylinder via an opening just for fuel. This gains fuel efficiency, and then they also make the engine smaller (like 1.5L instead of 2.1), and make up for it being smaller by putting a turbo on it. Voila, TDI.
What they didn't anticipate, was that in cold climates the computer will dump a lot more fuel in when cold starting and for a few minutes after, but this extra fuel at high pressure ends up making its way past the cylinders and into the oil galleries, causing the oil level to rise and weakening its ability to keep the engine cool. This isn't as bad an issue in warm climates since that fuel will end up burning up before mixing with oil. Also if you take short trips, it pretty much guarantees the fuel wont burn up since the engine will never warm up quick enough.
They also didn't clue in that in a regular engine, the fuel when mixed with the air acts as a cleaner for the intake valve. Now that there is no fuel and just dirty air, the valve becomes dirty over time and will eventually need to be repaired.