Oil/gas mixture is dependent on what motors you are running. Many OMC built motors built in the early 50’s have all brass bushings and they need a little more oil to live longer. One thing for sure DO NOT use automotive oils! They make carbon build up and will eventually clog up ports and exhaust passages. In my opinion use TCW3 synthetic oils. A little more oil is cheaper than buying parts. Plenty of members run 16 to 1 ratio. Myself I like 24 to 1. Mercury’s run all needle bearings and you would be alright with 32 to 1. Just my humble opinion!
dale
