Well yeah, but in absolute terms only. Car 1: instead of needing 5 gallons you only need 4 gallons. Saved: 1 gallon (20%) Car 2: instead of needing 2 gallo

Well yeah, but in absolute terms only. Car 1: instead of needing 5 gallons you only need 4 gallons. Saved: 1 gallon (20%) Car 2: instead of needing 2 gallons you only need 1 gallon. Saved: 1 gallon (50%) But who makes comparisons like this in absolute terms? I rather save 50% than 20%, but maybe that's just me.