Originally Posted by hellosailor
But hey, if you want to spend the same amount of money using an obsolete product and consuming twice as much of your time and effort......Isn't that really the way it works out when you do it twice as often? You're not saving anything! And, you're creating twice as much waste in the recycling stream, for the filters and the oil alike.
Since I change the oil myself ONCE a year no matter what oil I may have used, I don't believe it is costing me any extra time or waste. And the old oil goes into the marina oil recycle tank that is used to heat the place anyway.
I don't know when oil became "obsolete", but based on my oil analysis it is doing a great job!
Synthetic oil has been around way longer than my engine, but just old obsolete oil is what the manufacturer says to use. But if it makes you feel good I'm all for you using it in yours.