Join Date: Jan 2010
Location: Western NY summers, South Central FL Winters
OK, here's my calculations: '18 High Country Dually, 98% of mileage of just over 15K pulling heavy approx 19.5K pounds.
I wait until I get the 30% DEF warning and at that point I can dump in 5 Gal of DEF. Just did the cal and I'm burning
a Gallon of DEF every 471 miles, that's a lot more than my '11 LML did pulling the same weight.
Michelle S., 2018 Chevy Silverado High Country 3500HD, Crew Cab Dually, Duramax/Allison, towing a 43' 20000 Lb 2016 Redwood 5th Wheel Home on wheels, loaded with everything including the Kitchen Sink.