SRT Shoutback: shock oil goes green.
Every SRT shock absorber is factory-filled with eco-friendly fluid. SRT suspension engineer Paul explains how a small opportunity to help the environment turned into a big win for handling characteristics, too.
In a shock absorber, the piston is connected to a shim stack valve in the body of the shock. Oil flows through the shim stack to ultimately create the forces at the damper. It's important to manage the qualities of the oil in the shock so the control forces are predictable.
Anytime the shock absorber moves, you're displacing liquid, which generates friction, which generates heat. It's important to use an oil with the right properties, so that the customer experiences the same characteristics as we have when we're developing the vehicle.
Around 2007, we began evaluating a new, biodegradable shock oil. At first, we were skeptical of changing over. We had to make sure it met all our functional objectives, so we did all the testing and it came out fine. Our testing exceeds what SRT customers would normally encounter in their use of the vehicle. Under all conditions, the fluid is stable, predictable and biodegradable. To this day,we use this type of shock oil in all of our Bilsteins.