Any difference between synthetic oils?

[dolemite]

I drive an N/A, but am pretty fanatical about maintenance of my toys. Wal-Mart has a store brand of synthetic really cheap - shoot, their price on a 5 gal jug of Mobil 1 is really good too. I used Royal Purple from Pep Boys last change for around $35 w/ the filter.

So my question is, if the specs on the container are the same, is there a reason to not save a few bucks on the Wal-Mart brand? I'm in So. Florida in mostly city driving, trying to change every 3000 mi. or so.

Thanks!

[quicksilverdon]

Let's face it - WalMart doesn't produce the oil, they buy it from someone - I just don't know who. I'm sure there is a difference among synthetics, but I don't know which is best.
If you change at 3,000 miles (I go 5,000 on Mobil 1) you can't go wrong.

[dolemite]

Yeah Don, I'm starting to gather that if you change every 3k, there's not a huge difference. This change I decided to go with the Mobil 1/K&N combo. But it's an N/A and after I calm down I'll probably go 5k or go with a cheaper synthetic like normal people do