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Mine wasn't filled, so I can't comment on that.

I'll just share that my 2010 ram has a digital oil temp display and I've seen 250+ degrees on it when pulling my trailer up long steep hills at 4K+ rpm. This is with standard, nothing special oil from the dealer when they change my oil every 3K miles

I don't think you need to worry about the oil breaking down til beyond that temp. Oil and water temp are closesly related, oil takes longer to build heat, and longer to cool off.



Dustin, did you ever think about filling that block before you had built it? Anything deter you from it?

That tidbit about your ram is good info...do the trucks come with oil coolers from the factory?

Ideally I would really like to be able to do this WITHOUT a cooler