 On Shot Secret, we listen to our customers. Everyday Diesel Treatment delivers a 6-in-1 premium fuel treatment for every fill-up, every time. Our fans call it EDT. I'm Nathan from Ellisville, Mississippi, and I drive a 2017 Ford F-350 Power Stroke. I've been using Hot Strut Secret EDT every tank for almost three years, and I've seen about 1.5 to 2 miles per gallon increase in fuel mileage.