I have been an oil and fluid change junkie since 1982 and this site has made it worse. I now proudly display my latest oil finds in my living room for several days before consigning them to the "oil stash" area in the basement. One good thing, however: I discovered that GC makes my '99 Honda run a lot more smoothly and my wife likes this (it's her car). She still thinks that we are out of control fanatics, but she now understands a bit more.