The OEM iridium tipped spark plugs in a sixth generation 2016, 2017, 2018, 2019, 2020 and 2021 GM Chevrolet Camaro equipped with the Ecotec LTG 2.0 liter turbocharged inline four cylinder engine should be changed every 60,000 miles. Check out the DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below. (The steps should be similar for the 3.6L V6 and 6.2L V8 engines.)