I was reading some of the PCMO posts on great buys on full syn and syn blend. I decided to stop by a AZ and a Adv Auto in the Columbia, SC area. First the AZ had Pennzoil Plat 8.19 and Pennzoil Ultra for 8.69- both by the qt. A 5 qt. jug of PP was 29.99. Royal Purple was 8.99, only .30 more per qt than the PP. All of the above is 10w/30. I went to the Adv Auto nearby and found that per qt prices were cheaper by about .50. However, I ended up buying a 5 qt. jug of Mobil 1 EP -yes, Extended- and a Mobil 1 (12.99 reg. price) oil filter all for 32.99. Note: I have been using Pennzoil Ultra 10w/30 and really liked it. My LT1 Chevy V8 liked it.