Icons representing familiar in-game weapons like the banana peel and red shell (as well as a Pennzoil icon) are spread throughout a 1,000-foot long track, and grant bonuses when activated. The Pennzoil icon, for example, will speed up a driver's kart. The karts are representative of Mario, Luigi, Peach and Bowser who - hey, imagine that! - will be appearing in Mario Kart 8, due this May.
This might seem like a strange partnership, but hey, it's not the first time Nintendo has spread to the real world to cross-promote products. Besides, the Big N couldn't have found a more appropriate partner - Pennzoil is owned by Shell. Shell. Get it? Cuz it's Mario Kart.