Re: super tec oil
The only way to determine the difference between "best" oils and "lesser" oils is by actual laboratory engine testing, not by what additives are in it or what it costs. <br /><br />Oils are tested by running them in outboard engines under controlled environments, extreme conditions, and a set of standards. Then the internal engine parts are critically measured for wear and examined for damage. A scoring system is used for scientists to rate the engine wear and thus the oil's performance. It is a pass-fail process. <br /><br />Very seldom is the base stock, additive formulation, or cost of the oil taken into consideration. In fact most oil testing does not evaluate the contents of the oil at all. And expensive big name oils with high cost additives don't necessarily perform any better than cheaper generic oils with basic additives. In theory, you could bottle and sell any material (coffee, pancake syrup, herring oil, etc.) as outboard oil if it passed engine testing and emissions. It's all about the engine, not the oil.<br /><br />A reputable oil maker's goal is to come up with a formulation that will pass testing and emissions, and give customers a consistent, reliable product that does what it is supposed to do. How they do that is up to them, and they aren't going to tell you what makes their oils the "best". So you have to rely on certifications like TC-W3. After that it's up to the consumer to determine what he considers important factors in buying oil (cost, availability, how much he uses, smell, smoke, type of outboard, etc.). <br /><br />The Wal-Mart oil is a reputable oil used by many many consumers in many many outboards. It is certified as TC-W3. It is cost effective. It performs very well. Thus IMO, it is a very good choice in oil.