I do not know about you guys but out of curiosity I decided to wipe a paper towel on the inside of the exhaust pipe just to see how black it is. If you wanna know how clean AT-PZEV is, do it and see for yourself. You'll be amazed and how... white your paper towel is. I didn't believe what I saw at first so I stuffed it in further and it didn't get blacker :blink: I did it at 50,000kms....
<div class='quotetop'>QUOTE(Tideland Prius @ Jul 31 2007, 01:39 AM) [snapback]487869[/snapback]</div> Just checked mine at 17K and I was suprised. not much carbon at all!!!!