oil level warning light suddenly went on the other day - but the oil level was fine - even a bit too much. I checked it hot and the level was low; then I re-checked cold and it was pushing the max level.

I panicked and added a qt of regular oil to Mobil 1 before checking cold.

Now I have mixed oil and too much of it. How bad is it? Could I wait another 1,000 mi for oil change? I currently have 3,800 mi since the last one.

Also, is it a light mulfanction or it comes on for some reason?

Thanks in advance.