Ken,
Lots of good advice thus far and not you did not hurt anything, even if you decide to leave it in and just change it really early it will not "hurt" anything.
I would drop it and use it for make-up oil on a mower or other gas engine as others have suggested.
A note on viscosity....
The greater the difference between the two viscosity numbers the WORSE it is for the engine, generally and this does not really apply with fully-formulated synthetics like Amsoil, Mobil 1 etc.
Regardless of other factors, you should always use the viscosity specified by the engine manufacturer for the temperatures the equipment will be operated in. In many, but not all cases, this will be a single specification regardless of temperature (in the lower 48 any way) such as 5W-30. In extreme temperatures, other viscosities might be advised by the manufacturer such as 15W-40 for high temperature operation.
In years past, it was common to have multiple oil recomendations, but as oil technology has improved drastically over the past 20 years, this is less common now with most manufacturers centering on 5W-40 synthetic for year-round use in the colder climates and everywhere else 15W-40 conventional oil.
My recomendation is that if you are using a fully synthetic name-brand oil, use 5W-40 year-round and if anything else follow the manufacturer's directions exactly.