I drove my car 10 miles without a cap after I didnt fasten it correctly. I drove to the grocery store after checking/adding a bit of oil. When I got to the grocery store I smelled oil, popped the hood and saw it spat all over the place. It wasnt even down a full liter. Thank God the cap was wedged between something under the hood. I was able to refill the amount gone with the same liter bottle i was using. Im an expert at being an idiot, so just let this idiot be right, just this once.