Re: Oil Mix
As AntsGrady said, Johnson/Evinrude puts out their own brand of oil. It's expensive, but the cost of oil is not a major part of the over all boating cost, no? There is no objective information that I know of that would indicates it is any better than any other certified TCWIII oil.<br /><br />I personally think that any "good name" in oil that is certified as TCWIII is as good as the next. You can get certified oil for quite a bit cheaper than the Johnson oil - it's your call as to what you think is best.<br /><br />Like the guy said, you don't know the ratio until you know the year of the engine.