Max_Morley
Serious Thumper
Offline
LT650 Luxury Touring & sidecar rig
Posts: 1490
Moses Lake. WA
Gender:
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Way back when I was monitoring marine Diesel engines in operation we used to set the coolant to 180 F and oil temp to 225. That was for single weight RPM DELO 30. Seems like in EN"A" school 225 was the desired temperature for Lube Oil to help vaporize any condensation out. If my memory serves at 250 deg it starts to reformulate and become a solid. I used to have a styrofoam cup of oil I took out of the oil pan of early 70's Chev V-8 the owner though that oil changes were BS. 2 days before his 2 week long vacation the engine seized as the oil stopped pumping through the engine. We salvaged the tin and block. The heads, crank and cam /related parts were junk. I kept that cup of oxidized oil in a peanut can for 25 of my 29 yr teaching career (it went from here to Europe, back to WA state, then to AK I left it there when I retired). I could lift the whole cup out of the can with a wood pencil stuck in the oil. Made a good "show and tell" for those who think 30 days or 3000 miles is a sales tool. With better oils and depending on the kind of service the vehicle is used in the time/mileage may be debateable, but it has to be changed. Another case in point is my B-i-L's '04 Chrysler full size with the 2.7 l engine that has a history of sludging even with timely oil and filter changes. Toyota and VW had a similiar problem and stood behind their product. Chrysler has yet too and the long block runs at least $3500.00 exchange plus other items and labor to R & R. Having just helped do his, it is a 2 day job at best. Interesting on my '04 Colorado with an oil monitor, the first change was indicated at 14K miles after the vehicle was put in service. I do not run the oil /filter that long but did not reset the light to see how long it would take for the computer to message me. It went 20K miles the first year, so many trips were long runs at operating temperature which is best. Also in US NAVY we used to centrifuge the oil constantly which separated the oil, water and solids by specific gravity and kept the oil healthy for long times. So the numbers presented are reasonable. Max
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