Which credit card is best for rental cars?

The best card for rental car collision protection is Visa, says Card Hub, followed by Discover, American Express, and MasterCard. Card Hub, the big online credit card data source, recently completed a rigorous study of "free" credit card collision damage coverage, and, although I don't completely agree with the conclusion, the detailed findings are useful:

By Ed Perkins, Tribune Media Services

August 8, 2012