Take these results with a grain of salt. The way to excell in this test is very very simple, load your
oil with EP addiditives. The only issue with to much EP addidtives is they are very corrosive. Working in the petrochemical industry RP would bring this apparatus into a conference room in front of 20 engineers and perform the test with theirs and Mobil's products. Yes RP outperformed in this particular test but there are about 20 other attributes (test) of an
oil you need to consider. I get either for free all I want. I am not an expert, not even close but there are many other items to consider when making an
oil selection.
Our equipment runs 24 hours a day, 7 days a week at 50 mph, that is 1200 miles per day or 36,000 miles per month. We have gear boxes running for 10 years or over 4 million miles, some 20 years. True gearboxes do not have the side effects of combustion but we have agitators, compressors etc. For as little as we drive any oil we be acceptable unless you have flat tappets then use Valvoling VR-1.