ProtoSmoke is the recommended fluid for M.T.H. products and can be used in other manufacturers products as well.
MTH - E-6 ABA & 70' Passenger Set "Milwaukee Road"
MTH 10-1021 - Std. Gauge Lighted Lockon
MTH 11-6055-0 - Tinplate - Boy's Freight Set (Traditional)
MTH 20-20213-1 - RS-11 High Hood Diesel Engine "New York Central" w/ PS3
MTH 20-20304-1 - FA-2 ABA Diesel Engine Set "Western Maryland" w/ Proto-Sound 3.0