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Old 11-20-2018, 11:55 AM   #11 (permalink)
Master EcoModder
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,240

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
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Originally Posted by JRMichler View Post
I've had my full grille block in for several years. My cooling fan has never turned on, even up an extended slight upgrade at 91 deg F (33 deg C). But the radiator is sized for a larger engine pulling a heavy trailer.
Full winter front (underhood) until daytime highs are exactly 42F.

Partial grill block (exterior) until thermostat opens.

Full grille block (but maybe other openings) is more dependent on very specific factors. Some to vehicle, some to climate.

Engine block heater (anything that shortens time to full oil operating temperature) is a year-round quest. Not perfectly related to the above.

A weatherproof garage is still the best solution to vehicle economy.


2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 200,000 miles/5000-hrs @ 40-mph average.
1990 35' Silver Streak TT 7,900-lb.
11-cpm solo & 19-cpm towing; 21-mpg average past 54k-miles
Sold: 1983 Silver Streak 3411
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