Specialty tools for a given engine family drive me nuts. Is it really that difficult to design something which works with thousands of preexisting tools? Unfortunately, General Motors didn’t do that with their Ecotec engines’ oil filter caps, which are so common that nearly every mechanic is going to run into one at some point. Ecotecs have an unusual cartridge-style filter design. Instead of a paper filter element contained in a disposable metal casing, there’s an aluminum housing cast into the block which accepts a standalone paper filter, and it’s covered by a plastic cap with unusual artillery-pattern threads and a 32mm male hex on top.
Strictly speaking, you don’t need this socket to change the filter, but 32mm is a relatively uncommon size, and a metal socket will certainly cost more than the $5.70 RestockIt.com charges for this plastic 3/8in-drive Lisle. Yes, plastic is a strange material for sockets, but the low torque spec for that cap simply doesn’t require metal, and the low-profile design neatly sidesteps clearance issues. While Lisle’s description states that the socket is for 2.2 L engines, it should work for the whole Ecotec family. If you own an Ecotec-powered car and don’t need a 32 mm socket for anything else (like the same engine’s camshaft chain tensioner), this could be $6 well spent next time an oil change rolls around.