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Old 05-09-2013, 09:46 PM   #1
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1998 fleetwood discovery

What would be recommended to fill water antifreeze reservoir when low? Water,50/50, or straight antifreeze? If straight what kind/brand ?

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Old 05-10-2013, 05:15 AM   #2
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If it is your plastic overflow reservoir, I would simply add distilled water if you are confident that your coolant is in good shape.

Otherwise a 50/50 mix of distilled water and low silicate coolant that is meets the Cummins specifications.

As I think you have the 5.9 liter Cummins, you do not have to worry about SCA's.

1998 American Eagle 40EVS

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Old 05-10-2013, 08:01 AM   #3
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Join Date: May 2012
Location: Bandera Texas For the most part
Posts: 55
1998 Discovery

X2 what Dave said..Mine has a strong enough mix of anti-freeze so I just add distilled water...but..I don't have to add very often.
Chuck and Dot
2015 38RSB3 DRV Mobil Suite
2014 250 Ford Diesel Super Duty
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Old 05-19-2013, 12:50 PM   #4
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Location: League City, TX USA
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I use the 50/50 mix also. I keep a gallon container of it in the tool bay (the last bay on the co-pilot side)of my 97 Discovery.
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