Went to RockAuto to buy my normal Denso filter for the Prius and noticed that AC Delco Gold filters were cheaper and also had a rebate. Purchased three of them for another rig and two of them for the Prius. Yeah, the Rock charges for shipping, but if you have it shipped to a business address, you will save about 10 percent on shipping. Plus, the gold filters had a rebate thing going on....so....$2.70 or so per filter, minus $1.50 rebate. Anyway, use whatever filter you want -- I usually use Denso, but I figure a Delco now and again will do no harm.
