OIL Faves?
06-08-2021, (Subject: OIL Faves? ) 
Post: #10
RE: OIL Faves?
I can tell on my cm871 when then oil pressure drops 2 psi off of a fresh oil change. At ~1500 rpm it sits at 38-41 when fresh and when it gets time to change it drops 36-39 psi. Usually spot on to 12,000-15000 miles.

On my cm870 it told me by getting more chattery and breathing a bit heavier out the blow by. Fell right in the same mileage range.
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06-09-2021, (Subject: OIL Faves? ) 
Post: #11
RE: OIL Faves?
Ive done Delo but willing to switch to rotella :)
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06-09-2021, (Subject: OIL Faves? ) 
Post: #12
RE: OIL Faves?
Rotella and gear oil here. I can tell when it is time to change oil.
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06-09-2021, (Subject: OIL Faves? ) 
Post: #13
RE: OIL Faves?
Delo 400 and super tech gear oil for the last 500k. No issues.
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06-09-2021, (Subject: OIL Faves? ) 
Post: #14
RE: OIL Faves?
same as Nilao, Delo 15w40 and Super Tech 80w90.

Like the other guys I've begun to get a feel for when it needs changing. Sounds a little different. In fact it just transitioned a day or so ago. Also track my fuel mileage in a spreadsheet and it automatically calculates my next target oil change based on my running mpg average for that oil. Just so happens I hit that exact mileage interval today too. Unfortunately the oil and gear lube won't be delivered until saturday so she's gotta hold out another 700-800 miles. Roughly 16,000 on this oil, demandated and only slightly darker then when it went in.

For the record, I can also hear the difference when I get about 2 quarts down from the full line on the dipstick.


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