I cleaned out my throttle body when I bought the car with 60k miles and the damn thing looked like clogged arteries. 10K miles later I had to take the throttle body off while doing some other work and I was shocked at the amount of diesel snot that had accumulated after I had just cleaned it.
Pros: easy to clean
Cons: clogged arteries, builds up fast
Mileage: 60000 km
