Quote:
Originally Posted by mlh
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DEF (Diesel Exhaust Fluid) is a specific composition of urea for application in transportation to reduce the amount of nitrogen oxides (NOx) emitted into the air by diesel engines. DEF is a high purity chemical, comprised of 32.5% urea and 67.5% de-ionized water.
It’s set by the US government. Premium is selling the sizzle instead of the steak.
Lynwood
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Agree....DEF is DEF is DEF, it's all the same. I prefer to buy mine in the 2 1/2 gallon containers at Wally World or a local farm and ranch store that is sometimes cheaper. Each container is dated and it should be used between one and three years, depending how it is stored. The hotter it's stored, the shorter the life. One problem with getting it at Love's/Pilot/Flying J, etc is that the DEF tank in the ground is having new DEF put in and mixed with old DEF, therefore nobody knows how old it is.