Yeah 100% sure. It’s a shame we don’t get petro 94 in bc anymore. I’mI've used Sunoco/petro can 94 (e20) in the stinger exclusively and never had anything close to timing reduction. I've run map 5 in the summer no problem, and recently set the Canadian record of 4.04 0-60 and 12.13 1/4 mile on map 2 after recent mods of primary dp and Fmic. Never once have I seen the car pull timing or ping. Are you sure you know what you are hearing?
Still on factory plugs. Maybe switching out to a colder plug would help.