Okay – I have purchased a home in the Burb of Austin and am finally doing more commute driving. I am thinking I will finally go extended drain. Here is my plan – Car: 2002 Toyota Camry, 4 CYL, Manual, 30K on the clock. It will cover about 15K the next year, mostly easy highway driving (50MPH – 60MPH). Climate: Central Texas – Coldest day in the winter, +20 F; Hottest day in the summer, +110 F. Not dusty at all, except for occasional road construction encountering. Plan: Buy a 5-qt jug of M1 5W30 EP from Wally World, and a Purolator Premium Plus L14477, and a drain plug gasket from Advance Auto. The car has a 4 qt sump and does not use any oil on standard M1. Install 4 qt of the oil with the P+ filter for the winter. I picked the P+ for flow in the winter – I know oil pumps are positive displacement, I just thought a high flow filter will probably be easier on the element on a cold start. Drive it for 7.5K (which is the factory’s service interval), which will be May, 06, change the filter to a PureOne PL14477, use the remaining 1qt EP in the jug to top it off, and drive it for another 7.5K, then repeat the above. I do not plan on doing an UOA, as it would off set all my savings. From an UOA I have seen on a Civic with M1 EP, it held up very well for 12K of use. Comments?