- Oct 9, 2013
I use the blue DEF from Walmart. Others have talked about just filling it up at the big rig pump because it's cheaper. Just watch out for the DEF you buy as it has an expiration date.I would like to know more about DEF fluid. Are some better than others?
Kinda like buying milk huh?! I didn't expect to hear that it would have an expiration date? Does it have to be stored in the fridge too? (Just kidding!)
So what does that mean that it freezes below 12 degreees? Does that mean that it isn't used or necessary at that temperature? Or is there some kind of heater that keeps the DEF fluid from freezing? Let us know. Thanks!