This lawnmower never needs an oil change

[Frank Lee]

It is news because they've made some significant changes to finally address, after 100 years, dust and dirt ingestion into the engine.

[Xist]

My Subaru did not require oil changes, just a couple of quartz before starting the engine, and a great deal of stress each time I moved the car.

[Hersbird]

I have a 5hp Tecumseh motored Murray mower I bought new in 1988 for $100-150 that I have only changed the oil in once. I seldom add any either. The deck and wheels are going to die soon anyway. So had I spend $5 a year for 30 years on oil changes, I would be $150 poorer and still need to buy a new mower because of the deck and wheels. I am very satisfied with that mower to say the least.

[serialk11r]

I don't remember the username off the top of my head, but there's a tribologist who posts all over bobistheoilguy, and I recall him saying that synthetic oils don't really break down, so you theoretically don't need to change the oil, just refresh the additive package and replace the filter once in a while. It is important that you actually do that since the corrosion inhibitors do run out over time from exposure to water vapor.