What oil and oil filter do you use in your Mercruiser?

SerenitySerenity Member Posts: 162 ✭✭✭
Just thought I would get everyone's opinion. I own a 2005 320 with twin Mercruiser 5.0 MPI and Bravo 3 outdrives. They have about 230 hours on each motor. Mercury recommends using their 25/40 Synthetic Blend oil and their oil filter. I was wondering if there are other products which are the same or better. I have heard other boaters at my marina using 25/40 straight synthetic from companies like Mobil 1 and Penzoil with Fram oil filters. There is a large price difference but I do not want to save money and not do the right thing for my motors. Please let me know your opinions. thank you.

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