I think the key is less the impact and more the decarbonization from the Techron.
I await a buildup of experience on this. Not inherently against impacts, as I used them when I wrenched for a living, but I didn't have to deal with broken spark plugs. I'm interested to know, prior decarbonization aside, whether you are more or less likely to break them with or without the impact.
2005 F-150HD XL 4x4 5.4L 3V, 8200# GVW, 4.10:1,
Rancho Quik Lift, Gryphon Programmer, Dynomax 3-in Exhaust, 285/70R-17D Cepek FC-II (summer)/285/70R17D Michelin LTX (winter)