2015 Dodge Challenger Owner Manual SRT - Page 552

S C H E D U L E S Replace the spark plugs - 6.4L Engine ** 10,000 6,000 20,000 12,000 30,000 18,000 40,000 24,000 50,000 30,000 36 60,000 70,000 80,000 90,000 100,000 110,000 120,000 130,000 140,000 150,000 X 160,000 170,000 180,000 190,000 X X 200,000 210,000 220,000 230,000 240,000 250,000 36,000 42 42,000 48 48,000 54 54,000 60 60,000 66 66,000 72 72,000 78 78,000 84 84,000 90 90,000 96 96,000 102,000 108,000 114,000 120,000 126,000 132,000 138,000 144,000 150,000 102 108 114 120 126 132 138 144 150 8 Flush and replace the engine coolant at 120 months if not done at 150,000 miles (240,000 km). M 550 MAINTENANCE SCHEDULES A I N Miles: T E Or 6 12 18 24 30 N Months: A N Or KiloC meters: E