Train Nut posted:Mike Reagan which almost everyone agrees knows his stuff, and is a former employee of Lionel said himself - "Do not use Mega steam in Lionel engines"!
I've had issues myself, but I won't get into them.
Do what you want.
I'd stick with Lionel smoke fluid in Lionel engines..
So is Mega-Steam bad or was Lionel's product designed not to work with it? We've never ever had issues with it in MTH engines.