Home › Forum › Ask A Member › the big debate (what oil are you using and why) › Re: the big debate (what oil are you using and why)
Back in the late 90’s I was attending outboard service training in Dallas Texas, as I had done every winter. The subject of 2 cycle oil came up during class. I remember telling the instructor that I had always used Merc Premium Plus [unlike Mercury Premium] in all my engines as well in everything we sold at the dealership… I wish that I would have written down everything he told me about oil that day, cause now I have forgotton a few of the details. He did tell me that Mercury Marine had done extensive endurance testing of the Quicksilver Premium Plus 2 cycle TCW 3 oil, and compared to others [at the time] it was far superior, and far exceeded TCW3 ratings. He also said that some of the oil that was tested would barely meet the TCW3 rating, but since it technically made the cut, it received the rating. I remember when they came out with the DFI outboard oil for the Optimax, Mercury stated [at that time] that it was perfectly acceptable to run the Premium Plus oil in the Optimax engines, or of course you could use the DFI oil, made for the direct injection engines. So, in short, I have always used Quicksilver Premium Plus in everything, and have for 25 years now. I do not wish to debate what oil is better or worse, nor will I debate about fuel oil ratio’s. Just wanted to throw out my humble opinion, respectfully..