I've just gone over 10,000 miles and am ready for another oil change. I had it done at the certified Toyota dealer last time and the result was too much oil. I had them redo it and it was only slightly better. I ended up just going with it out of sheer frustration. I've never changed oil before, but I would really like to start. I've read john1701a's PDF document and have a few questions: 1) Where should I buy an oil filter? 2) If I have a receipt for the oil and oil filter, is that sufficient to prove an oil change for warranty purposes? Thank you for the help, as I really want to do everything right.