One thing which I dont understand is that people spend so much on oil but forget the importance of oil filter, on this thread i have read that people change oil filter on alternate oil change. You are putting new oil with used oil filter-why?.
Secondly, the OEM oil filter is designed for that specific engine by the designer.......read this (from wiki)
"Most pressurized lubrication systems incorporate an overpressure relief valve to allow oil to bypass the filter if its flow restriction is excessive, to protect the engine from oil starvation. Filter bypass may occur if the filter is clogged or the oil is thickened by cold weather. The overpressure relief valve is frequently incorporated into the oil filter. Filters mounted such that oil tends to drain from them usually incorporate an anti-drainback valve to hold oil in the filter after the engine (or other lubrication system) is shut down. This is done to avoid a delay in oil pressure buildup once the system is restarted; without an anti-drainback valve, pressurized oil would have to fill the filter before travelling onward to the engine's working parts. This situation can cause premature wear of moving parts due to initial lack of oil."
My cars are maintained by Toyota Garden & Honda Fort and I buy OEM filters from them.
Do you know that Corolla & Altis have different Oil & Air filters........