Originally Posted by dtabbs

As for oil getting darker quicker, that actually means the oil is doing its job. As an oil cleans the engine it will get darker. I would worry if the oil is not getting dark as that means the detergents are not working.

Anyone that says one oil is better than the other, supply facts by providing an UOA. An oil cannot be determined quality by seat of your pants.

Originally Posted by ssyellow

Fact of the matter is how many people here have experienced engine failure due to Mobil 1?

If you really want to find out how its working with your engine send an oil test out to a lab.