I was lucky. I found KC Trouble free oil at the beginning of my experience. I WON'T use anything else. I've never had oring problems, sludge buildup, etc.
No buildup, less wear, no breakdown
I love this oil. I have never had gun problems while using this oil. It doesn't damage orings, it reduces wear of parts and one bottle has lasted me over 3 years. I can't say enough about this product. I WILL NOT use another oil for as long as I continue to play. The only way I would go looking for a new oil is if KC goes out of business.