i put Energy Suspension in James (Mr. Mandango) car, he just reported that they've seriously degraded in performance in less than a year...
I say fill it w/ a $2 bottle of poly, that will make your day. I tried that on a set of Nismo motor mounts, rattled the hell out of my car. This rockin' KA didn't budge, a beautiful sight at 6500rpm. Solid. Try it for fun
Jesse