Anything with a greater range should be fine. Mobil 1 0W-40 is the choice of some CEGers. In general, though, unless you have a special application, 5W-30 is what you want. I use 0W-40 for the winter, since it gets down to -25 sometimes. But, it's hard to find, so I often just stick with the 5W-30. The difference is pretty slim.
