Originally Posted by Katana29

Both, but mainly consumption. I drive long distances pretty frequently and I'd rather not carry oil around with me if I can help it.

And yeah I would have thought it is what it is with blow by, but the burn off rate was doubled with the 0w-40 compared to the 10w-40 and there's no way the properties of the oil aren't factors with such a significant change.

I only discussed the valve train noise because the thicker oil also seemed to run quieter than the thinner oil (lubricating things better).