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Winter fuel economy improvers  RSS feed
Forum Index » Recommended Mods for Longevity
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Joined: 10/07/2009 07:25:47
Messages: 374
Location: Southeast Michigan
The CRD is prone to lose around 10% of its fuel efficiency during winter months. This is partly due to winter fuel having less BTUs than the summer blends, however it is also related to the much cooler air entering the engine and lower coolant temps.

Options to reduce loss in fuel efficiency:

1. Remove the accordian style air inlet snorkel at the front of the air cleaner. This will allow the engine to ingest warmer engine compartment air through the air filter and tends to improve FE.

2. Remove mechanical fan during winter months (if not planning to tow a trailer). This will tend to reduce air flow through the radiator and reduce engine load at the same time.

3. Block a portion of the front of the radiator to reduce the amount of cold fresh air that naturally flow through it. This can have the largest impact and may need some fine tuning in regards to percentage blocked vs. temperature on the coolant gauage. Blocking 50% of the radiator surface is a good starting point.

Joined: 22/04/2011 20:23:20
Messages: 2
Next thing we will do is blocking the rad. The fan is out and we get 8L by 100K at minus 10C. The ECO tune work perfect.
Cliff Downing

Joined: 30/12/2011 21:09:13
Messages: 1
Get a Fia winter front. Or better, the combo winter/summer front. I got this soon after buying my CRD in '06. Very reasonable price. This will do the same as both blocking radiator and allowing warmer engine compartment air to get in air box. The summer front snaps in place of the winter front, and helps keep bugs and other junk out of the radiator fins.
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