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My buddy in the shop said something about DEF quality that got me thinking
He was working on a 2022 Freightliner with a persistent SCR fault, and he told me the driver had been buying the cheapest DEF from a no-name truck stop off I-95. My buddy said, 'You wouldn't put watered-down fuel in it, so why treat the DEF system any different?' I always figured DEF was DEF, but now I'm starting to check the spec sheets and look for the API certification mark. Has anyone else seen problems tied directly to poor quality diesel exhaust fluid?
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leo_murphy6mo ago
Remember hearing about a guy who mixed DEF with tap water to save a buck. Totally seized the whole dosing pump.
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the_sean5mo ago
Guys probably exaggerating, a little tap water can't kill a whole pump that fast.
5
brian456mo ago
Yeah, that "DEF is DEF" thing is a trap. Saw a Cascadia with crystallized injectors last month. Guy was using some off-brand jugs from a farm supply store. Total mess.
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