Steve,
I have high mileage vehicles, as do my children (I change their oil). I use Mobil 1 10W30 HM in my Avalon. I use Purolator Pure One oil filters. I have 225,000 miles on the car, and it is quiet and silky smooth. The oil costs $22 for 5 quarts at WalMart. I get the Pure One filters at Advance for $6.50. For years I changed oil and filter every 5,000 miles, but after seeing the UOA's and reading on this site, I am increasing it to 7,000 miles. If I were not going full synthetic, I would (and do use on my son's car) Maxlife blend. It will easily go 5,000 miles and costs $15.50 for a 5 quart jug at WalMart. These are two of the finest oils around, and the Purolator Pure One filter is about as good as it gets for an oil filter.
Mark