I know this subject has been talked about, hashed and re-hashed many times but I want to bring it up again. Seeking recommendations about a proper oil to use on a pistol (4506) that resides primarily under my pillow and very seldom goes to the range as it's proven it's worth and reliability since I got it back in 1991. It's primarily my "house gun".

I have FP-10, CLP and Gun butter as oils to use. Which would be best for this purpose without evaporating or gumming up over time? Or, is there something better other than what I have?