Oil Viscosity Test, Interesting Results

[07GTS]

mine was still golden when i was n/a up to about 3-4000km because the inside of my engine was clean, i had some light black at the bottom of the sump and that was it, on tare down all items heads/block crank everything was like it was just fitted to a new engine, this is what a good running engine with proper oil changes can do i had about 37k on the engine total, if the black oil is left in there too long over time it attaches to all surfaces so any new oil goes black quicker as it tries to constantly clean it