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I found this simple but very educational test on youtube to determine if there is water in your oil. The video is about 3 minutes long and is well worth watching.
https://www.youtube.com/watch?v=-5MABCBxU60
Dave M7040
hmmm... that brings back memories of a test we use to do to determine water content in WVO fuel.
Might work for testing your motor oil. We just cooked it in a spoon. Hold spoon with glove or pliers and heat spoon with lighter and see if it bubbles. Bubbles indicate water. More formal version used at one point in the WVO world was
[quote="Old hot pan WVO vs Water test]".
Smear a finger of wvo accross a fry pan (cast iron preferred)as a temp check.
Keep the sample of wvo to be tested handy. Enough for 1/4"-3/8" thickness covering the bottom works best.
Heat the pan on high temp until the smear begins to produce smoke then pour in the sample.
NOTE:
Do not pour in a sample with any visible water. If water droplets are visible no testing is needed. There is water present in your sample. Visible droplets of water will spatter hot oil out of the pan and may cause burns or fire.
Look closely at the bottom of the pan where the oil meets it. Are there very small bubbles forming. This indicates some suspended water. The number of bubbles indicates how much water is present in suspended form.
I usually accept a FEW bubbles myself. Lots of small bubbles is unacceptable to me. If crackling or popping is heard..way too much water is present.
I have tried to keep this test as simple, cheap, and translatable as possible.
It works....though it is not "foolproof". False positives can be obtained if the pan is WAY too hot..or if solvents are mixed in the WVO. And false negative results are possible if the suspended water has high concentrations of salt/sugar/ acids."[/quote]
assume it would take some testing of other oil samples to get a gist of what is normal and what is above normal water in your motor oil. Example take a bit from same oil and let it settle. Another and boil out the water. Then perform same test on each see what suspended water (won't settle out) and what no water looks like when using hot pan test