The Insurance Institute for Highway Safety evaluated the seats and head restraints on fourteen minivans in rear-end crashes. Seats were places on sleds in a simulated 20 mph crash. Only two, the Ford Freestart and Mercury Monterey, were rated good. The Dodge Grand Caravan and Chrysler Town and Country were rated acceptable. The Honda Odyssey was rated marginal. Rated poor were the Chevrolet Uplander, Buick Terraza, Pontiac Montana SV6, Saturn Relay, Chevrolet Astro, GMC Safari, Mazda MPV, Nissan Quest and Toyota Sienna. To protect against whiplash, don’t drive with your seat tilted back, and the headrest should be within four inches of your head and it should always be above your ears.