You must NEVER use a good oil in the engine if it is new, as it wil prevent decent bedding in, just use a mid range mineral oil, for the first 2000 miles or so, but change every 500 miles, something like castrol/duckhams, but MINERAL.
There is nothing inherantly wrong with mobil 1, it is a good oil, not the best(IMO), I would just use something a little thicker but everyone has thier own ideas.
tabetha