Originally Posted By: Eric Smith
My grandpa is 80 and gasped that I did one year oil changes up 10k. I don't try to change his or my dad's ways though.. it's their business. They both know if I do it's probably ok and don't give me a hard time for it. Had a few wrecks but have never blew a motor or trans.
What I would do if my grandfather or dad was shocked with my long intervals, is I'd pop off my valve cover and show them how squeaky clean it is.