Re: What size socket for oil filter cap
Why not just use a metal strap wrench (with a rubber handle)? I've been using a Plough for at least 15 years now across 4 vehicles. It's a one-size-fits-all solution. Normally these kinds of solutions don't work very well, but this is an exception - and you won't have to buy another wrench or socket for your next vehicle (or confuse multiple sockets when you go to use them ... its bad enough that these manufacturers can't at least settle on a standard oil plug bolt head size).
2011 Equinox 1LT (new Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 108+k miles (June 2017)
2002 Impala 1LT (new Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /202+k miles (June 2017)