winter-fronts, why are they no longer needed or used?

Modernized equipment has made them virtually unnecessary unless you are running one of the older trucks.

 

I can’t give you an answer to that. But can tell you that Freightliner was tagged by the EPA a few years ago. For too high of heat reading in the engine compartment. They were forced to make some adjustments

 

Global warming makes winter fronts obsolete.

 

At normal running operation, the new engines run plenty warm enough outside of extreme cold temps. Since idling is discouraged, and most have APU's, they're just not really needed or desired unless the temps are regularly down below +10f, and even then they're not really needed unless you idle for cab heat.

 

Mine goes on at -25 to make my beauty sleep cozy. Otherwise no need if you going to keep moving

 

One item that made the winter front obsolete is the fan clutch. Also advancements in thermostat and water pump designs, the installation of the charge air cooler in front of the radiator contributed.

 

I think the biggest reason you don't see them on any company trucks is because it'd still be there in June, maybe I'm wrong about that. Newer motors are getting enough fuel they stay warm on their own.