 Reported mileage by the car was off by 17%.See chart below:                                                                                                                                                                              Date; Starting mileage; Ending mileage; miles driven; # of gallons; miles/gal as reported on "C"; miles/gal actual                                                                             01/13/17	24189	24464	275	7.103	40.4	  33.297	7.10301/16/17	24464	24747	283	6.922	43	  36.078	6.92201/21/17	24747	25088	341	8.112	44.1	  35.988	8.11202/07/17	25088	25388	300	7.278	41.8	  34.522	7.27802/24/17	25388	25742	354	8.352	44.8	  36.448	8.35203/09/17	25742	26081	339	7.961	44.3	  36.339	7.96103/29/17	26081	26573	492	7.945	44.1	  36.155	7.94504/11/17	26573	26888	315	  7.249	45.4	  38.151	7.24904/22/17	26888	27252	364	  7.775	48.8	  41.025	7.77505/04/17	27252	27628	376	  8.129	48.3	  40.171	8.12905/15/17	27628	27979	351	  7.529	47.3	  39.771	7.52905/30/17	27979	28348	369	  8.271	46.7	  38.429	8.27106/27/17	28324	28692	368	  7.731	44.8	  37.069	7.73107/16/17	28692	29040	348	  7.896	45.5	  37.604	7.896