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Highest I’ve ever seen was 255 on the oil and 230s on the trans and coolant. It was a warm trip and pushed the truck. They came down real quick when I took my foot out of it or came off the grade
Pulling the grades around Tonopah last fall.
They were unusually long. Ones here in Oregon are over and done with fairly quickly it seems.
I had my oil Blackstoned last few changes and flash point is at 395. So figure I’m fairly safe.
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