I was just thinking about this myself. The ecodiesel guys on the Facebook pages seem pretty religious about checking PH and changing it at higher miles. I figure it’s preventative maintenance since I too tow like you do. Just hit 34k miles on our ‘22.How offen do you change the coolant in your 3.0? I tow a little camper in the Arizona heat. I’m at 26000 miles on my 2021 JLURD. Also how important is checking the PH on the coolant? Thanks