DEF Fluid in fuel tank

Phj

New member
Dec 21, 2024
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Pennsylvania
Has anyone else accidentally put def fluid in their fuel tank?
I looked up the outcome on line and it’s not pleasant to say the least, I’ve checked through my insurance policy and it does not state anywhere about accidental fuel contamination
Does anyone out there know if their insurance company covered this?
2021 L5P engine
 

2004LB7

Super Moderator
Staff member
Dec 15, 2010
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Norcal
Welcome

No idea on your insurance as that is going to be policy specific

But you are correct about it not being very good. I thought I remember a thread years back about it. Rust and corrosion was a big issue with it. Along with the high pressure fuel pump not liking the lack of lubricity and can die a quick death from it.

If this happened to you or someone you know, drain the tank and flush out all the lines including the high pressure lines and change the filter before running the engine. I'd probably also run a tank of B20 as it provides more lubrication then straight diesel. May also absorb any remaining moisture better then diesel does

Also, moved the thread out of the forum suggestions to general fuel and exhaust
 
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