I have several different brands of two stroke machines. At least two of them have different oil/gas mixture ratios. Dealer tells me that the sythetic oil Tanaka is the solution. Mix with one gallon of gas per application and all machines can use the same fuel. Is this true and will any other damage result? I have had guys who use echo's tell me that they will use stihl 2 stroke oil with them and all of thier other 2 strokes. What is the main difference and what could possibly go wrong?