I wanted to buy some full synthetic 2 cycle oil (TCW-3) for my speedboat. The boat has a a135HPV6 on it, and I thought maybe the full syn stuff was smoke less. I bought a gallon of it from amazon in Feb. When I opened it in June, it was oil colored (yellow), not blue or green as I had anticipated. The OEM said it might be defective. I recycled it, rather than risk the motor. I complained to amazon to no advail So $55 down the drain.