Found it…

I had my wife find one of my 10 mm sockets, I was working on the car prior to a trip back in 2016 and being a V6 had to take the inlet off to change rear plugs, putting the final nut on the engine cover dropped it down the back of the motor, thought no worries it will fall out n the driveway when I move the car nope, we go away on our trip 3 days later at a camp ground 600 miles from home she picks up this1/4 drive 10 mm socket and says look what I found, all I could do was laugh it had stayed on the back of the motor for the whole trip.