First, shame on you for not having a tool kit in your car. Second, while I have several older SAKs the oldest one that I bought new is just over 20 years old and is an ECO Tinker. The nylon scales wear like iron and the tools have held up well.
The Tinker is my favorite, I find I use the small blade often, much more than the awl on the pioneer or the Farmer, and I wasn't in my car at the time. My car always has a tool kit in it.