hammer55-JAY
Senior Member
have a kind of dumb question, for those that stay in a park for a while,, what about the quality of the DEF, does anyone worry about it going bad during a long time in one spot, especially during the summer months??
A year is usually it's limit.
Buy yourself a refractometer so that you can occasionally check your DEF quality. Simply draw a small sample and test it. This is the one that I have.
https://www.amazon.com/Refractomete...9Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
Thanks! Just ordered one.Buy yourself a refractometer so that you can occasionally check your DEF quality. Simply draw a small sample and test it. This is the one that I have.
https://www.amazon.com/Refractomete...9Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
Buy yourself a refractometer so that you can occasionally check your DEF quality. Simply draw a small sample and test it. This is the one that I have.
https://www.amazon.com/Refractomete...! I had no idea this existed! Damian Neeld
I had filled my DEF tanks in February 2020 in preparation for a big trip....well we all know how that year went. We had some use that year locally but not enough to use much. I would pull a sample every month and check it with a refractometer and it always tested good. I also have the Bluefire monitor and can watch the quality on it and it was showing it down to 32% from 32.5%, still within acceptable specs. We just finished up a trip in 112° travel weather pulling a 11k trailer and finally burned through that tank just last week and never had an issue. Towards the end of that tank, with the added outside temps, the quality got down to 31.75% as heat does affect the quality but we are talking pretty high DEF temps, as you can see the DEF got up to 118°.