I changed the oil on both cars at the beginning of July. The story here is changing out the Drain Plug Washers (DPW). We had drips from both cars and I thought fresh DPWs would fix it. While changing the oil, I noticed the oil filters were on a little too loose (you don't install them very tightly to begin with, but these guys would turn pretty easily), and that's where the oil was leaking.
DPWs anyway are a different story.
The Subaru had a crush washer. It comes with a curled lip around one side that crushes to fit the oil pan and drain plug as you tighten it. It's working well.
The Miata was a PITA because neither the crush washer, nor the assortment packs I got at the car parts stores fit right. Now I have a pretty steady dribble on the garage floor.
New DPWs for both cars ordered from Amazaon in boxes of 25 ($10).
