DEF usage is about 1-1.2 gallons to every 100 gallons of fuel used. To use a gallon a day would be a long hard day of driving. I ran Blue until my local Walmart started to carry their own brand. It works just fine and is cheaper. The flex spout works ok to fill. I usually put old rags around the fill just in case. If you do spill, just flush the area with water.
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Leo and Janice
2007 MS 36 TK3 Glide Ride pin box
2012 GMC 3500HD D/A CC 4X4 DRW AirSafe Hitch
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