Wal Mart's Super Tech DEF?

naturist wrote:
On the one hand, the recipe for DEF is fixed in the law like no other product. The result is that one brand is identical to the next. No "secret ingredients" or "special sauce" is allowed.

On the other hand, some retailers have fallen prey to disreputable customers buying a jug, filling their truck, putting tap water back in the jug, then returning it for refund, with the result that when you go to the store, you need to check that the container still has intact factory seals, and if it does not, don't buy that one.

Other than that caveat, buy the cheapest you can find; it is all the same. Really.

aqueous urea solution made with 32.5% urea and 67.5% deionized water.