I'm no expert, but some random thoughts.

* Unless you understand the properties of the line you are using (and the procedure), using it to extricate or tow your vehicle can very dangerous. Climbing rope, and random stuff you might be find at your local box store are very unlikely to be suitable for safe vehicle recovery.

* Amsteel Blue, the line referred to in the original post is a high tech fiber called Dyneema, which IIRC is a Spectra/Nylon blend, and is not comparable to most of your run of the mill line of similar thickness.

In fact, it is sold as winch cable.

* Winch line, or lines with similar properties, is NOT what you want to use to pull your vehicle out using another vehicle! Look up a technique called "snatch recovery" or "kinetic recovery" and understand the process and get the proper gear.

* The "tow hook" on your Subie, probably isn't! This is probably a tie down and it is unsafe to try to use it as a tow point. In general, you'd probably be better off with a tow hitch and a receiver shackle bracket.

* Understand the properties of your line. Especially some of the high tech lines, while they may have some very impressive benefits, people often overlook they sometimes have gotchas. Like being very slippery and not holding knots, to losing all their strength if bent around too sharp of an object.

* Your recovery system is only as good as its weakest link. Understand all the links.

* Check out a TIFOR or "hand winch" over a come-a-long. Black Rat Hand Winch Working with a hand winch

Random links:

* Tom Moyer - High Strength Cord
* Recovery

My suggestion? Get a proper recovery strap and associated equipment, understand the attachment points on your vehicle, and read up on vehicle recovery.

Good luck.

-john