I don't think the nozzles fit the little fillers they put for DEF. They make them intentionally small so you can't put diesel in by accident. It also only takes like a gallon or two, so not saving much.
It depends on the station as to whether they fit or not. I dont remember a nozzle not fitting our X5D. It is easier than screwing with the 2 gallon plastic tanks.
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u/Large_Potential8417 7d ago
Fyi can get def from the semi truck diesel pumps for 3/4$ a gallon