Well, I did, just for the heck of it, and it does indeed seem to still have it's poop. It did a decent job of cleaning out crank case sludge from an engine that's probably sat for 20 years.
Einstein, when describing radio said "Wire telegraph is like a very long cat. You pull his tail in NY and he meows in LA. And radio works the same way: you send signals here, they receive them there. The only difference is that there is no cat."