Fill up on hardy savings by ordering your oil filler cap from AutoAnything. If you've gone to fill your oil only to find out your cap's missing, you probably want it fixed. Replacing your oil filler cap not only means you're keeping fluids where they ought to be, it keeps your resale values high by maintaining factory specifications. What's more, at AutoAnything, your oil filler cap ships free—no minimum purchase required. And, when you order by today's deadline, we send your new cap out the same day.