I have used supertech synthetic in the 2001 Camry belonging to my gf's mom. It runs fine and she runs it for about 5k miles. She drives it as if she's in a battle, and so far the oil looks fine everytime it's changed. Sure, I won't be running it for 10k miles like mobil1.
I am a walmart shopper, gotten even more loyal since Costco tried screwing me over. But beware what you are buying at walmart. Those Walmart brands can sometimes be a real POS, specifically jeans, shirts, some electronics.