1993 Cadillac DeVille Owner's Manual - Page 225

WINTER DRIITNG Here aresome tips forwinter driving: Have your Cadillac in good shape forwinter. Be sure your engine coolant mix is correct. Snow tires can help in loose snow, but they may give youless traction on ice than regular tires. If you do not expect to bedriving indeep snow, but may haveto travel over ice, youmay not want to switch to snow tires atall. You may want to put winter emergency supplies in your trunk. 212