53590 | Corn Field Cadilac - 2/11/2015 20:36
When we came out with the DD-15 in 2007
We did some side by side tests vs same spec Series 60
DD-15 beat it by 5% same day same load etc etc, fuel SAE test .
BUT
That gap narrowed to less than 1% in winter.
Threw us for a loop.
Turns out.
The last few years of 60s have T stat in oil cooler.
The DD15 did not.
Oil was being overcooled !!!
DD-15s all have thermostats in the cooler now.
Cold oil relatively speaking takes hp to pump.
I'd leave em in.
My 2 cents
By the way, you want oil to get above boiling temp to boil off water, or you get acid forming.
Oil can be too cold.
Your statement about getting oil hot to boil off water is very true!! Have a friend who works at car dealer and he said you can always tell between cars that get to operating temp for a period of time and one short tripped. They had to manually clean slime out of an engine that a guy drove 3 miles to work shut off and repeated daily. He said there was almost half a quart of water in there! I was shocked when he said they have a guy who puts lots of miles on his suv and run 20,000mile oil changes with mobil 1, guy has 290,000 on it!!!! |
Oil temperature ISX.
