[Topspinmo]

CHECK the OIL when you fill it up! if it's low PUT OIL IN IT (dirty oil better than NO OIL). If it's black and gooey Change it. Most only hold quart of oil. That's 4 to 8 bucks.
The older it is the more you need to pay attention and up keep. ESPECIALLY IF YOU SEE OIL DROPS ON THE GARAGE FLOOR or you see puff of blue or white smoke occasionally, you have oil burner/leaker that's overheating and damaged the seals that hold the oil inside the crankcase. CHECK the Oil weekly.

Course if you got thousands to throw away just run it till it goes Clank Clank which means the connection rods about ready to come loose and when you pull the dipstick you see NO OIL. But, it's Too late then?

OK lets see hands the don't know where the dipstick is or how to determine it the oil level is GOOD????