I use Mobil 1 in all my cars from day 1, and anyone with a Turbo should be using it. Advantages? Supposedly you might see a little more MPG. The big advantage is that you can go further between oil changes....but I don't, still changing every 3K. It also gives you better protection in extreme weather or under load (if you tow anything). You could lengthen the oil changes to 5, 6 or 7K and still feel protected. Some reports say you can go a heck of a lot longer...but I sure wouldn't. The disadvantage, of course, is that it could cost you around $5 a quart ($4 if you buy it in bulk from Wal-Mart). Oh yea, I use 5W30 all year round down here.
