[Artan]

Originally Posted by jkv357

Look at independent lab tests here - Oil Analysis Reports - Bob Is The Oil Guy and see if you find any evidence that oils do degrade with use.

Or it may be a conspiracy...

I am not saying that they degrade or upgrade. I am saying that to convince me that we need an oil change there should be a test with two same engines one with oil change and the other without. Drive them for certain amount of time and mileage, see the fuel and oil consumtion, open them and the internal parts of the engine for inspection if and how did they wear, compare and the result will be obvious. Its very simple. The labs are just saying the oil contains these kind of minerals and their amount. Thats it. There is no conspiracy, this is totally something else.