French magazine calculates the real savings using low-rolling resistance tires
For the challenge, Autoplus got two Peugeot 308s, one fueled by gasoline and the other fueled by diesel, and they kept on changing their tires. They tested fuel consumption with regular tires and with "CO2 reducing tires." Their verdict? Keep security in mind. Only low-rolling resistance tires that came from well-known brands (Michelin, Goodyear, Continental and Pirelli) performed correctly and kept braking distances and other security features almost intact. Their winner was Michelin (which are made in France) which stayed safe while offering fuel savings of 1 percent with gasoline and 3.8 with diesel fuel. Of course, it doesn't matter if your tires are lrr type or not - keep them properly inflated.
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