DEF fluid
Is all DEF fluid the same? I usually buy the Blue DEF but it's now about $20. Our local hardware store has the Blue DEF and another one that is $12.99. I did buy the Blue DEF but just wondered if the ...
Forum Discussion
deltabravo wrote:Bionic Man wrote:
From what I have read, expired DEF won't hurt your engine.
It's impossible for DEF to hurt an engine, because it is injected downstream of the engine, hence the reason it's called "Exhaust" fluid.
If you run out of DEF you could experience "no engine restart". Meaning the sensors keep you honest. I agree it's no harm to the engine but it could leave you stranded if you chose to ignore it.
I have been using the local auto stores brand of DEF (Fram in this case) in my former 2020 F350 and my current sprinter based class C. About half the price of Blue and never had an issue.
The irony is not missed on me that the plastic container DEF comes in is not recyclable. Glad we're saving the planet.
