How do you tell if your oil cooler is clogging before it ruptures and mixes "milkshake" into your cooling system, and what is the maximum safe tempera

[DeepBore]

My EOTs (Engine Oil Temps) are starting to creep up, and I’m worried my oil cooler is becoming a ticking time bomb. What specific temperature delta between oil and coolant is the "point of no return" before I risk a ruptured cooler and a "milkshake" mess?

How are you guys monitoring your deltas—are you trusting a CTS3 or manual gauges? I’ve heard 15°F is the limit, but is that just for cruising or under load? I’d love to hear what your numbers look like and if a backflush actually saved your cooler or just delayed the inevitable.

 

[RawCast]

The 15°F delta is the industry standard, but how you measure it matters. You need to get the truck up to operating temp and cruise at 65 mph on flat ground for at least 20 minutes. If you’re seeing a 15°F+ gap just cruising, you’re in the 'danger zone.' Under a heavy load, it’ll naturally climb higher, but it should snap back quickly once you level out. What are you using to monitor?