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2K views 3 replies 2 participants last post by  79jasper  
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#1 ·
Due to health issues we cound not do our summer3 month trip. The truck has moved very little maybe 20 in 2 months . Does the DEF go bad ? or any other issues I should be aware of.
Thank you in advance
P.S. I doubt we will travel any were till spring of 2022
 
#2 ·
Yes, it does go bad. It will crystallize.
I think most manufacturers state a shelf life of 9 months or so. But once it's opened to air, it goes down drastically.

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#4 ·
Not that I'm aware of.
The other fluids are fine, but you may treat the fuel with a additive.

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99 & up 7.3L Power Stroke Engine & Drivetrain 6.0L Power Stroke Engine and Drivetrain 99 & up Upgrades and Aftermarket - 7.3L Engine Power Strokes 1994-1997 General 7.3L IDI Diesels (Not Powerstrokes) 1988-1993