My 2 cents. I have an 02, and the magical black paint chips. I did my second change today (lots of miles, @ 65k miles ). Lots of sediment and black chips in the resevoir. Takes all of a min to pull it out and give it a good flush. I have always used non-silicate anit freeze and demineralized water. Hopefully, @ the 90k mile change, the sediment will be at a min. I also use Royal Purple -Purple Ice (similar to water wetter). Hope this helps as well.