After reading in threads that smoke unit performance depends on the type of fluid and the transformer being used, I decided to try a few of my transformers out and see if there was some truth to that theory. I initially started collecting S gauge American Flyer trains years back so my larger transformers at this time are postwar Flyer models 15b and the larger 18b. I do not at this time have a Lionel ZW but would like to test that one out as well. I used 6 drops of Dept. 56 Magic Smoke for the test and let the train (Marx 666) run around the track until the smoke output ceased for each transformer. I must say I am surprised by the results. The winner for the greatest amount of smoke output was the Lionel CW-80 !!!! The cw-80 produced twice the smoke output of the other transformers and I am not sure if I understand why. The small transformer in the photo is only 50 watts so I can understand that one. The other two large AF transformers however are 110 watts and 190 watts! The CW-80 is only 80 watts yet produced the most smoke! Why is this??? Maybe someone can explain why this is.