Mercury Mercruiser Sterndrive Inboard Oil Change Kit Genuine OEM Mercury-Mercruiser part. This Mercury 4-Stroke Oil Change Kit contains everything you need to change the oil on your Mercrusier Sterndrive Inboards. Mercurys line of DIY oil change kits are ideal for DIYers who want to save time, money, and hassle. This convenient kit comes with Mercury engine oil, an oil filter, a seal, and instructions. 4-Stroke Outboard Oil Change Kit for Mercury Mercruiser in-line 4 cyl. 6 cyl. Mercury Merc