Genuine Ford Fluid PM-27-GAL Diesel Exhaust Fluid - 1 Gallon Required for diesel vehicles equipped with a selective catalytic reduction (SCR) emissions after treatment system Reduces NOx emissions in diesel vehicles with an SCR catalyst AUS32 fluid meeting all the requirements and purity standards of ISO 22241 and DIN70070 Nozzle specifically designed to fit the DEF filler opening of 2011MY and forward Ford diesel vehicles (as well as many competitive vehicles) and prevent over filling the DEF tank Use only dispensing systems that are compatible with DEF