Awesome tool for DIY oil changes. A lot of new cars I've seen have a "crush washer" on the oil drain plug that needs to be replaced if you undo them. They aren't expensive, but I'd forget to pick them up sometimes. That meant holding off doing the oil change and wait to get some, or risk a leak and re-use the old one. But using this means no need to undo the drain plug. Plus it's just easier, and cleaner. I'd still recommend the occasional regular procedure - especially if your drain plug has a magnet on it to look for metal shavings.