Noel Weaver wrote:The only time I would not use the device was in extremely cold weather and I seem to recall that the railroad had instructions regarding the use in cold weather.
I'm thinking in low temps the viscosity of lube oil & fuel could stall out the engine vs keep at notch 1 power output.
nope. first notch is still idle. if the reverser is centered, and units are equipped, they will run at a "low idle" speed, otherwise they run at "service idle" speed, in idle and run/notch 1. fuel runs through a heater anyways, and excess warmed fuel is returned to the tank, at any speed. lube oil doesnt really matter. it's 30 weight, and doesnt get that thick, until you get into single digits or below, if the engine isnt running.