Well, here is an update. Pump is doing great. The first few days, the DEF consumption was ridiculously high. Then it settled down to normal. Not sure if this thing does some sort of calibration routine or what.
Now for the kicker. My MPG has increased substantially. And no, I don’t think it’s the new pump. However, on my biweekly trips to the coast, I usually average 22-23 Mpg running 55-65 mph on highway 341. Last weekend, my average (calculated) was 26.4 mpg. The DEF gauge barely moved. I was empty, except for chainsaws and other cutting gear going to St. Marys, GA to help with the tornado cleanup after Elsa passed. I’m leaving for another trip tomorrow. This is too strange.