Hello everyone.

I have a quick question about diesel exhaust fluid (DEF). I’ve been using it in my truck for a while now, but I’ve recently noticed a drop in its efficiency. I know that DEF helps reduce emissions, but could there be something I’m missing in terms of maintaining the fluid levels properly?

I’ve read that using low-quality DEF can cause issues, but I'm unsure how to tell the difference between good and bad fluid. Any tips on how to properly maintain and check the quality of diesel exhaust fluid would be greatly appreciated!