First thing to understand about stuff like this is that a magazine article is just a single data point. I write magazine articles and we're limited on time and budget. Magazine articles are not the same thing as OEM testing. The guy who wrote the article probably put 5 or 10 dyno pulls on the engine and printed out the dyno sheets and wrote the article. I doubt that he fabricated the numbers and I'm sure they put 87 octane in the fuel tank. But that doesn't mean that engine will run on 87 octane in a 4000 lb car in the middle of the summer going up a hill. That wasn't the test condition. The dyno test was probably on a nice cool day with big fans blowing on the engine and cold water in the water tank. So yeah, the article is probably right but it doesn't mean that the engine in your car will run on 87 octane fuel.