<prompt> Human: Pay Gas with Cash or Credit wrewards?Sorry for this more than likely stupid question, but Ive been boggled by it.I spend 150 on gas each month to commute to my job. I drive a 2002 Toyota Corolla. I always pay cash when buying gas so I dont pay an extra 10 cents per gallon. If I used a Credit Card with 3 or 5 rewards, would it be worth it for me along with the increase in 10 cents per gallon Id be paying. Im sure I can figure the math out, but wanted your insights. Thanks again.After doing some excel, it seems like the 5 reward would give me a little money at the end plus build my credit in the process. Let me know if this is the best observation for this scenario.  <response>: I agree:Assume youre paying 3.75gallon cash price. This averages to 40 galmonth. Scenario 1: you pay 150month cash and get no further reward. Scenario 2: You pay credit rate of 3.85gal which equates to 154month. At 5 rewards, this puts back 7.70 in you pocket thus you effectively pay 146.30 per month.Another way to think about it: at what point is the 0.10 additional fee greater than 5 of the total cost. Gas would have to be like 2gallon before it would be cheaper to pay the cash rate man, those were the good ol days. 