Autolite

Autolite was founded in 1936 and is one of the longer-standing American spark plug brands. The company produces copper, platinum, and iridium aftermarket replacement plugs covering a broad range of passenger car and light truck applications. The current product lineup spans the standard Copper Core series through the XP Iridium line, which uses a 0.6mm iridium fine-wire center electrode with a platinum-tipped V-trimmed ground electrode.

Autolite is an aftermarket cross-reference manufacturer — not an OEM supplier to any major automaker's factory line. Products are designed to match OEM heat ranges and gap specifications using published cross-reference guides. The brand is owned by FRAM Group, a division of Energizer Holdings, and is distributed through major automotive retail chains and online platforms.