I normally use a Mobil 1 EP (or K&N) oil filter (via the Autozone sales) on my wife's RX330, but I am going to try the new 10,000 mile Fram. For $7.97 at Wally's, that is a great price for what appears to be a solid filter. I change the oil every 5K and replace the filter every 10K. It will be at least 9-10 months until I have results, but I will get a UOA at the end of the Fram run.