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Here in Montana during the winter I see quite a few diesel powered pickups with a quilted black cover over the front grille.

Can someone explain the logic behind this? We do get a few weeks per winter with temps between -10 and 10 but most winter days are more like 5 to 25 degrees.

Do the covers provide a warmer running temp and more efficiency? Or do they make starting easier?

Thanks,
Dagotto
 

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Those front grill covers keep your engine running closer to its optimal temperature. They restrict the amount of cold air moving thru the radiator. Sometimes in extremely low temps, engines struggle to achieve their optimal temperature where they are the most efficient etc. Grill covers won't make it start any easier when cold. For that, you might need the engine block heater. New Ram has active shutter system that automatically regulates the air flow thru the radiators. Definitely no grill covers are necessary here.
 

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Those front grill covers keep your engine running closer to its optimal temperature. They restrict the amount of cold air moving thru the radiator. Sometimes in extremely low temps, engines struggle to achieve their optimal temperature where they are the most efficient etc. Grill covers won't make it start any easier when cold. For that, you might need the engine block heater. New Ram has active shutter system that automatically regulates the air flow thru the radiators. Definitely no grill covers are necessary here.
do the grill shutters account for that? I was under the impression they were an aerodynamic play...
 

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Regulating the temperature is key for the best performance possible. At least they added it rather than gone with out
 

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There is another thread that shows the Ram truck going through extreme cold weather testing though. I would say that it could increase performance, but most of the time the truck will run fine anyway. The gains that you get I think would be pretty marginal.
 

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There is another thread that shows the Ram truck going through extreme cold weather testing though. I would say that it could increase performance, but most of the time the truck will run fine anyway. The gains that you get I think would be pretty marginal.
Active grille shutters are only available on Ram 1500. For some reason Ram 2500/3500 still needs the grille cover:D. Take a close look at abovementioned video showing one of the trucks with the grille cover on. The important issue is the lubricant temperature. If the engine oil is not in it's "sweet spot", lubricating parameters are compromised. Thicker oil causes more friction which translates to excessive wear to the engine and more fuel consumption.
 

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wow the dodge dart has the active grill shutter. cool stuff. havent had a new car for a while. all this tech has me smiling.
 

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I think a lot of chrysler vehicles will be getting these grille shutters, even other vehicles, it's almost becoming an industry standard.
 
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