For KFM, one of the best cards is the CitiPremier Miles Card Conversion is S$0.83 per KFM Amex normal cards are the best for KFM, don't use Amex KF Gold unless you want only the 5000 Free KFM Normal Amex Cards give conversion ratio of 1.2 KFM per S$1.60 spent which is greater than 1KFM per S$1.60 sp...