Mercury - Check Oil Decal Safety & Identification Series High-Bond Marine Vinyl 8M0159598. Overview. When you run a Mercury Racing 450R, you get used to paying attention to the details. Big power means big responsibility, and even the small labels on the cowling play a part in keeping the engine healthy. That's why having the correct Check Oil decal matters more than most people realize. It's not just a sticker - it's a reminder, a safeguard, a little piece of factory precision that keeps your m