Yeah Wal Mart is great for oil at least the one's down here actually just picked up two 5 quart jugs one for my focus and one for my explorer. Yes i know the focus is only 4.5 quarts oh and the filter are slightly cheaper there but just barely
I'm sure it is hard to do better than Mobil 1, and I'm glad they have an oil compatible with the PZEV engine. I've always used Mobil 1 in my other car, which my Focus is now kinda replacing. My other car's an '86 Shelby GLH-S, which most of you folks probably heard of. It has a little plaque on the valve cover stating that Mobil 1 is the factory-recommended oil for the engine. I pulled off my valve cover at 100K miles (and 15 years) and it looked almost NEW inside!
I wouldn't put any of those other 'big name' synthetics (i.e., Castrol, Valvoline, etc.) in my cars. Those only came on the market after they lobbied to change the rule on how "synthetic oil" is defined, which is now broader than it was previously. As far as I know, Mobil 1 is still the only widely available true synthetic out there. (Redline, Amsoil, et al, are great products I'm sure but very expensive and limited in distribution.)
I'll probably switch to Mobil 1 0w-20 after a couple K miles of driving the Focus. Thanks all.
There has been a good deal of discussion about the merits and demerits of the lighter oils. Nobody should be bending over backwards to use these light viscosity oils. In the long term, the engine will wear more quickly since the thinner viscosity oils can't isolate wear particles as well as higher viscosity oils. Those concerned with the longest possible engine life coupled with the highest quality performance will do well (IMO) to use a 0W30 or 5W30 real synthetic oil like Mobil 1 or Amsoil, or even a 5W50 like SynLube.