News to me...I was unaware that any LP gas fueled mowers were available. Makes me wonder how often the engine makers for such equipment recommend oil changes...I mentioned in another post about the converted to LP gas forktruck I used to drive at my former job, the LP gas burned so clean the oil in the forklift took forever to get dirty. I am wondering if that fuel burns clean enough you could skip the oil changes once in a while.
I, too, drove forklifts for about 10 years in varying jobs, and they all were LP. I asked the company doing the maintainence on them the very question you did, JD. Because the oil still looked new.
They said that although the oil doesn't see fuel in it like gasoline and diesels do, it still sees heat, and that is as much a contributor to the breakdown of the additives in the oil as raw fuel is. It still need changing, but at about twice the hourly frequency as gas/diesel. Another thing that breaks down is the multi-viscosity quality of the oil. The oil is still oily, but still needs changed.
I would imagine that a synthetic oil could be stretched out twice it's recommended interval, as well. But, that still will lose something over time to heat. What that something is, not sure....but I know synth lasts a lot longer than traditional multi-vis oil.:smile: