Using Box Office reports, crowd reports, and Yahoo! user reviews, The World of KJ estimates that Cars has pulled in $15.5-17 million on it's opening Friday.

Michael Xia, a columnist at WoKJ, said the following regarding the Yahoo! reviews for Cars, "Yahoo behaved better today on an hourly basis than it had been for some time. Cloggings still existed, but they didn't last for more than a couple of updates, at least on paper. Cars looks to finish with around 1,200 reviews. Being a kids-oriented movie, it will have a low ratio, but it won't be as low as what Over the Hedge had since it has Pixar's brand and appeals more to adults. A ratio of 70-75 is likely. That will put its Friday gross at $15.5-17.0m."

WoKJ's users have been using Yahoo! reviews to track openers for years. While the system is not full proof, it generally produces a very accurate estimate. It should be noted that Yahoo! recent switch to a new home page has thrown some ratios off, because of this the ratio is harder to nail down than it had been in the past. This effect should go away over time as new ratios are generated.