Not since new. I bought a 14 that was used at 75k. Tuned it at 85k now it's 133k. So a bit. But when I'm going up to Payson from the Phoenix metro valley she wants to climb up in temp. But if I hold it in 4th at 50 mph it will stabilize at 3/4 to 7/8 on temp
So i have 14 grand cherokee with eco in az. I got the gde tune with the 180 thermostat. It's a huge difference to be honest. But because in az we get quite hot here. When towing our pop up (4k lbs loaded) uphill I have to hold it in 4th gear @ 50 mph in order to not overheat. Oil temps hold...