I installed polyurethane front sway bar bushings 8 months ago on my Jeep Grand Cherokee because the OEM rubber bushings wear out very fast and have to keep replacing them. The poly bushings work great can definitely notice the improved stabilization fom just the bushings. They did not have the zerk fittings style for my application\year. Don't know why. Anyway, now after 8 months they are sueaking over every bump and it's pretty annoying. I lubed them at the time of install with the supplied lube they gave me. Is there any other lube you would recommend that would last more than 8 months? These are from energy suspension. Is there another brand out there that would have the zerk fittings style bushing and bracket for my application. 1998 Jeep Grand Cherokee Laredo 6 cylider. Thanks.