I don't like product bashing. Especially from highly suspect individuals.
http://www.performanceoilnews.com/oils_against_oils.shtml
"In the 0 up to 40 weight category, it seems Mobil's new 0W-40 produces terrific power, insignificant viscosity loss and a middle-to-fair wear particles rating."
Also just so you all know:
Zero-based viscosities, means naturally less friction. Less friction means MORE horespower.