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Chamberpains · 06-08-2021, **(Subject: 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.

armana87 · 06-09-2021, **(Subject: OIL Faves? )**

Ive done Delo but willing to switch to rotella :)

74bassman · 06-09-2021, **(Subject: OIL Faves? )**

Rotella and gear oil here. I can tell when it is time to change oil.

Nilao · 06-09-2021, **(Subject: OIL Faves? )**

Delo 400 and super tech gear oil for the last 500k. No issues.

JimT · 06-09-2021, **(Subject: 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.

Truckdriven · 01-31-2022, **(Subject: OIL Faves? )**

I have been unable to find rotella T around here in 55 gal. barrels but have a supplier with PETRO-CANADA Duron HP 15W-40 readily available. How does this compare to shell oil as far as quality and additive package?? I want to stick with a brand for the long term not keep switching every other oil change.

Precisionw900 · 01-31-2022, **(Subject: OIL Faves? )**

Delo 15w-40 and sta-lube 85-90 here changed every 8k miles on average. Demandated makes big difference on soot at change intervals. I run delo in 3 trucks and over 30 different pieces of heavy equipment and have never had a oil related failure. Just pick a top shelf oil and stick with it.