Again 2015 Sprinter chassis- No DEF gauge. I Consistently get 1700-1750 mpg for DEF, I can add a 2-1/2 gallon jug of DEF at about 4300 miles. Easy to keep track of and I don't purchase DEF until it's needed. It does have a shelf life--
It is not a good idea to run DEF level to where you get a warning light or a starts remaining countdown. Technically it should clear when you fill the DEF tank but if it doesn't you need a dealer reset..
The 1700 mpg is my unit YMMV
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U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
2016 Siesta 24ST
1972 Moto Guzzi Eldorado
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