[JasonA]

Travis, do some research on BITOG.com. You'll find out that rumors of paraffinic wax buildup associated with Pennsylvania crude oils is one from decades ago, and one that doesn't really carry much proof anyway.

The only way to argue about an oil's usefulness or results is to post UOAs (Used Oil Analyses). You can see what's in, and what's not in, your oil, and it'll help you determine oil change intervals, etc. Because of these types of analyses, you'll actually find that Pennzoil is one of the most often recommended oils on BITOG, an internet forum like this chalk full of oil experts and oil geeks alike. Pennzoil Platinum, while not a true "synthetic" (it's a Group III oil), is a favorite on BITOG. And for conventional oil, Pennzoil Yellow Bottle is often recommended, along with Havoline.

I'd encourage you do so some research, as you suggested to another member. You'll find that rumors from the past don't hold true now. You'll also find that boutique oils like Amsoil don't provide any increased level of protection, but they'll lighten your wallet pretty quickly. Lots of data there (BobIsTheOilGuy.com)...go check it out.