Originally Posted By: JohnnyJohnson
My little Sears Briggs and Stratton mower doesn't have a filter or see that kind of service time. I change the oil with Valvoline SynPower Full Synthetic Motor Oil SAE 5W-30 every other month.
That would make you paranoid, unless you use it non-stop for a pro lawn service. My Sears Briggs mower is over 20 years old and has had nothing but standard dino 30wt in it the whole time, changed once every 2 years. If you want to tell me that my mower is magical, I can accept owning a magical mower, lol. Except I've had the same experience with many different engines.
I'm not dismissing the benefits of synthetic oil here, if I were to buy new today I'd contemplate using one but even then, odds are it's going to be wheels, carb, pull cord, deck rust, progressive degeneration of the rest that fails before optimal oil quality made a difference. They just aren't the same beast as modern automobiles.