Colby: I have been running an Opti since 99 also and I use no where near that much oil..if I did I would have to raise my guide prices considerably. Now during break in they are programmed to use twice as much as normal but after that it should use less oil than a conventional two stroke. Now when the Opti's first came out Mercury was touting that they would get twice as good oil consumption of the conventional engines but fact is they aren't quite that good but definitely use less than conventional engines. With the variable oil injection system a lot of how much oil you use is dependent on how hard you run your boat..ie...if you run wot most of the time you are definitely going to use more than if you run at lower speeds. Anyway, I am not a mechanic for sure...but if my Opti started using oil at a rate of 25:1 I would have it sitting at Jetta Marina tomorrow getting worked on.