DEF fluid gauge accuracy - Page 2 - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

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post #13 of 16 (permalink) Old 08-22-2019, 07:37 AM
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When my DEF gauge needle touches the red, I add 2 1/2 gallons which pushes the gauge to full. I don't think the gauge is accurate or linear.


2015 3500 LongHorn CC, 4x4, SRW, CDT, 68RFE
2013 1500 Laramie CC, 4x4, 8 speed
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post #14 of 16 (permalink) Old 08-22-2019, 09:57 AM
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This explains how the gauge works and why it is not linear.


2015 2500 Bighorn
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post #15 of 16 (permalink) Old 08-22-2019, 12:22 PM
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Quote:
Originally Posted by kthaxton View Post
This explains how the gauge works and why it is not linear.
Wow, that explains it. Thanks for posting the link.

RAM should have since they are using a non-traditional fluid level detector, either included a paragraph in the owners' manual that says something like the gauge indicates full and only starts to track when the fluid level once it falls to 2 1/2 gallons or used a different notification on the cluster. I guess one could argue no one reads the owners' manual but there are exceptions.

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post #16 of 16 (permalink) Old 08-22-2019, 12:33 PM
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My truck uses much more DEF when towing. 'Specially in the mountains.

'16 2500 Bighorn 6.7 Cummins CCLB 4x4 68rfe Timbrens Hellwig // 2017 Hallmark 8.5' UTE Pop-Up.
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