Yesterday I placed an order for a new Evinrude e-tec. I was unprepared for the question regarding using traditional 2-cycle or synthetic oil. Apparently the motor must be calibrated before delivery for the type of oil to be used. Also, the warranty is valid only with the use of evinrude synthetic oil. The salesperson seemed to know as much as I do about the advantages/disadvantages. I'm wondering if anyone has strong feelings and/or factual information on this topic. One of the cons is the price of Evinrude synthetic oil ($40.00 per gallon).