I had the same issue with oil drips from the oil pan bolt. I did like I have done on 20+ cars I have owned...turned the crush washer over and reused it for the second oil change. After a couple days my garage floor had some oil on the floor. So I removed the panel and sure enough it was dripping from the oil drain bolt. Bought a 10 crush washers from the Mazda dealership and replaced the crush washer. Cured the issue. I will for now on replace the crush washer at every oil change.