I have a 2002 nissan frontier pu. It uses steering stops (look like bolts) that have plastic caps on them. The caps continuously crack and fall off (I've even tried gluing them on). Some don't even last a year. They are getting harder to find and naturally getting more expensive. I have begun to lube the end of the bolt/stop and the area on the control arm that the bolt/stop contacts. It works, but because it's exposed to the elements doesn't last long (maybe a month of two at most). I'm currently using high temp lithium bearing grease but have tried things like anti-seize, and waterproof bike greases with more or less the same results. Are there any greases out there that are "really really" sticky (tenacious?) and might last a little longer (maybe 3 or 4 months instead of 1 or 2) being exposed. It's a relatively easy job to do. But I do have to get under the front end of the truck and my poor 73+ year old body complains every time.