[Freedom4US]

DEF fluid? Is that like VIN number and ATM machine?

[Svartalfiar]

DEF fluid? Is that like VIN number and ATM machine?

If you read the first couple sentences of the excerpt, it'll tell you!

Do you know what DEF fluid is? It's Diesel Exhaust Fluid. Every Diesel truck that has been made since 2010 is required to use it. It's a product made of 67% Urea fertilizer and 33% distilled water. Every diesel truck you see driving down the road today has to have this product to drive. The engines won't start without it.