The Autolite "copper CORE" spark plugs have a "nickel-alloy" coating on the threads as well as both electrodes, therefore as metallurgy dictates, dissimilar metal(nickel-alloy against aluminum cylinder head)corrosion WILL occur! Anti-sieze provides a dissimilar metal barrier, as well as lubrication for removal, just like NGK's trivalent plating, which FYI, are recommended for Subaru's WITHOUT anti-sieze, due to poor grounding conductivity. I have NOT seen any published specification for the GM LUV/LUJ 1.4L stating dry, or no anti-sieze, along with the torque specifications! Please enlighten me? If in fact there is a note indicating "dry", just subtract 20%(if you wish, or read on) from the torque value. I sure as he** would not want to pull the threads out of MY cylinder head! The low torque value of 18 ft. lbs. combined with an accidental(if you wish) 3.6 ft. lbs. (****, sure is INTERESTING how 18 + 3.6 = 21.6, EXACTLY WITHIN NGK's torque specifications) is negligible at best, there ARE tolerances on ALL fasteners FYI, this is WHY I get payed "BIG BUCKS BUBBA"! DEFINITELY better than the 2 FINGER TIGHT spark plugs I removed, that some "CLOWN" installed, which BTW, can literally tear the threads out of a cylinder head when BOOST PRESSURE are inherently increased on these turbocharged engines!
Sorry for the rant, but you contradicted yourself about the composition of copper spark plugs and begged me to "GOOGLE IT", so I did and I HAD to set you straight(FYI, platinum and nickel ARE very similar in that they have VERY POOR conductivity)! This is exactly why I rarely, if at all share on forums. Facts are facts! Opinions are just that! Everyone has opinions! I'm NOT God, just a layman! ALL information is subjective! It's what YOU choose to do with it that matters! I have worked a parts counter for several years(FYI, I have NEVER, EVER, seen ANY anti-sieze on a spark plug, just hexavalent coating, I'm pretty sure you meant oxygen(O2) sensors, they indeed come with anti-sieze due to the extreme torque values and of course the requisite ignorant clowns who may install them and want to sue out of ignorance, worked on vehicles as a career(pulled threads out of aluminum cylinder heads because of ignorant mechanics!), been wrenching for 47 years, currently I'm entrusted to build the most advanced fighter aircraft known to man(the BIG BUCKS analogy)! But yet, I am just a layman trying to share a tip and not get "flamed" ignorantly!!! I lived in So.CA for 20 years and saw my share of "hornblowers", I can do without, (LIKE FRIEBURGER for instance(douchebag, mommas boy!)! Take it with a grain of salt, I sure did!!!