My brother-in-law has about 20 cases of Sears Spectrum (some of it is a bit old -- have to check the bottle spec next time I do a change for him). It is WPP version.
He runs 7K miles with Fram orange cans or Walmart Supertech filters. Uses it in 2 Camry's and a Matrix. Highest mileage vehicle has about 90K on it (4 cyl Camry). All vehicles run well with no issues.