Michelin Energy Saver A/S Tires are On Sale Plus Free Shipping! Expanding on the technologies of the Michelin Energy Saver summer tires introduced in Europe during 2007, the Energy Saver A/S All-Season Passenger car tire introduced in North America during 2009 offers exceptionally low rolling resistance at or below the levels offered by its European summer tire counterpart. The Energy Saver A/S features Michelin's EnergySaver Construction combined with a unique silica-based tread rubber that helps improve engine fuel efficiency by keeping the tire cooler. This compound is molded into a symmetric design that features siped, independent tread blocks to combine predictable handling, no compromise stopping performance and all-season traction without trading fuel efficiency. Circumferential and lateral grooves direct water through the tread design to help resist hydroplaning and enhance wet traction.