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Increased radiator blocking in winter.....
I have approx 1/2 of my radiator blocked with cardboard...over and above having the top opening blocked and a front pan installed.
I have an LED indicator installed that lets me know when the rad fan runs. Noticed during a warmer spell...60s-70s...that even with the rad 1/2 blocked...the fan only ran a limited amount....indicating maybe blocking by 2/3s or so would be OK.
Have noticed that with my car...I'm seeing almost the same indicated mpg (SG) after the car is well warmed up when temps in the low 30s F as in summer driving.
Wondering about practical and safe methods to increase and keep underhood temps higher?
Block heater? Blanket? Variable rad opening?
This is how a 2012 Focus can get 47 mpg on the freeway on 40F weather?
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