if youy boat is three years old or older,you will feel the increase in power. restore 2-cycle oil additive is bleded with a premium ashiess oil fomaulated for use in 2-cycle engines. nmma certified for service extra range two cycle tc-w3 directions:add one can (8oz.) to each gallon of high grade oil you normally use in both dorect injection or oil pre-mix systems. danjer harmful of that if swallowed contains pretroleum distillates do not induce vomiting . csll your physian immediately . keep out of reach of chidren.