Like Fudman said, oil is oil. The important part is actually changing it. Even conventional discount brand dino oil will work fine. The correct weight oil is more important then the brand.
Some oils ARE better then others, but if you're not racing AND change your oil often...well then buying boutique oil is for suckers imho. I drive my cars hard, so I buy expensive oil. I also change my oil filter mid way between fluid changes, just a habit I got into years back. Cheap and can't hurt anything.
Cheaper oils have less detergents and R&D put into them. Detergents help keep sludge to a minimum. However, changing your oil often removes the need for detergent heavy oil.
Walmart Supertech will work if you want a cheap synthetic. Just change it out every 4-5k.
Amsoil is the best fluid available, purchased online usually.
Just my .02