BMW TwinPower Turbo LongLife-04 5W30 How well the engine oil protect the engine?

Engine oil friction test BMW 5w30 Twin Turbo Longwife-04 What does the test show? The test is to show how effectively engine oil protects the engine. Friction test, to simulate engine operation. Metal components in the engine during operation (friction, eg pistons) can lead to scratches and scratches. The better the quality of oil, the better it should protect the engine before it is formed. Each sample subjected to this test will probably have some scratches. By measuring the sample, we will be able to check the depth of the groove. How does the test run? The new sample is subjected to metal friction under 1 kg load for 5 minutes. Then the sample diameter is measured at its lowest point. Each new sample has diameters of 2.92 from which the diameters of the sample to be tested. By subtracting both dimensions, we get a real measure of sample consumption. The result is lower the better. Result: 0,01 Summary of engine oils table: https://docs.google.com/spreadsheets/... Summary of engine oils charts: https://docs.google.com/spreadsheets/...