Originally Posted by Mr. T
I've been reading posts on DEF issues and check mine with a Refractometer prior to adding. I know there's multiple reasons these fail and just trying to do what I can to limit an issue.
My question is the reading should be 32.5, but I was wondering what level above or below is the point that starts indicating it's bad.
Just wondering, have you ever seen anything but 32.5? I got a refractometer maybe 4 years ago & I test every batch. I buy 2.5 gal @ WM, auto parts stores, etc. different brands etc. & I've never seen anything but 32.5. Me thinks the stories about bad/tampered with DEF might be a bit exaggerated.