Clear, easy to understand, a little bit controversal, and—most importantly—disturbingly accurate.

http://goo.gl/h88k8

Castrol, Mobile, Valvoline, Gulf, and something with a dinosaur. Any guesses? I'm not old enough to remember these, but we did used to get maple syrup in similar ones back in Michigan.

http://www.a2591.com/2011/04/pure-condensed-and-vintage-power.html