Last night I had a dream, where for some reason I had bought a used 2007 Hyundai Sonata - and on my third or fourth drive in it, the ominous 'low oil pressure' light came on as well as a non-existent "Low Oil Level" light, which was especially weird since there was no oil leak. Then I remembered that I apparently had a bottle of 10W-30 oil in the trunk, but just before I was about to pour it in, I realized that it was the wrong oil for the car. I forgot what happened after that.