Wallywingtip

Thanks very much folks. I appreciate all the advice. Agreed, perhaps we don't have a problem. I'll report anything else we learn.

Thanks William. I'll give that a try next flight. I checked the temps on both the OEM guage and the engine monitor when stone cold - both were at ambient. Yes, two probes. The OEM probe is just before the oil cooler, and the engine monitor oil probe is in the galley block, and both read the same in flight yesterday, which was about 125 degrees F, and in the green. The ambient temp in flight at 6000 feet was minus 10C. A cool day, but not minus 40! Looking at a previous (6months old) oil analysis, there is no water, emulsified nor free, in the oil. So, perhaps our concern around water remaining in the oil is ill advised. However, I still feel we should have warmer running oil temps. Our mechanic is thinking we ought to inspect the 'seating' of the vernatherm when we pull it out to test it. Does anyone have experience with vernatherm seating issues? Many thanks folks.

great idea. Thanks.

That is good to know, though we have a continental. Oil colour is normal.

Thank you for all these good ideas. The low temp happens in summer and winter - approx. the same readings. Not below the green but Savvy says too low to burn off moisture in the oil, and well below the cohort. We'll check the other items you list. Thank you.

No. but both the EDM and the primary are reading low, so we thought it real.

We have consistently low oil temp in cruise of about 145 degrees F. Too low to burn off moisture, so we are concerned. Pressure is normal. We have changed out the vernatherm, and lowered the cover plate on top of the oil cooler, and have seen no change. Engine baffles seem good. Any suggestions are appreciated. We're scratching our heads. brentvogan@gmail.com