Well, so much for Lionel smoke units.
Per the owners manual, I added 20 drops of MegaSteam to begin with.
This one failed after only about a dozen trips around the oval.
The cab light started blinking in 3 blink increments; had to reset it using the direction button; tried that 3 times and after the 3rd, the unit permanently shut down. 3 blinks means a fan problem.
Worked great to start then slowly smoke began to wane.
ARRRRRRGH.
Had the same thing happen to a Lionchief+ B&O and Pere Marquette Berkshire.
Will send it back to Lionel on Monday as I did with the other 2.