"A couple squirts of your favorite chassis grease and they will live a very long life."

I strongly question that, as I have seen many cases of urethane sitting on the shelf, fail over time. Now if the suggestion is that an oil squirt keeps them from "drying out", seems the manufactures would promote that, unless selling replacements is their real objective, every few years. work

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.