Parts for your 2013 Subaru Xv-Oil cap

2013 Subaru XV Oil Cap — What It Does and How to Look After It

Technical sources confirm the 2013 Subaru XV does use an engine oil cap, and it’s absolutely relevant to routine servicing. The 2013 Subaru XV Owner’s Manual shows the “Engine oil filler cap” in the engine-bay diagram, and Subaru’s service information for the FB20 2.0‑litre boxer engine notes the cap and its sealing ring as standard lubrication components. On most XVs the cap is marked “ENGINE OIL” and typically shows the recommended grade (SAE 0W‑20).

On this XV, the oil cap seals the top of the engine’s oil filler neck. Its job is simple but crucial: keep dust and moisture out, keep oil and vapours in, and provide a clean opening when topping up. A good cap maintains crankcase sealing so the engine breathes correctly via the PCV system, helps prevent oil misting around the engine bay, and makes sure oil doesn’t splash out under revs.

If the oil cap’s seal hardens, cracks, or the cap is left loose, owners may notice an oil smell under the bonnet, a light film of oil near the filler neck, or even messy splatter after a drive. In some cases the engine may idle a bit off because of the unmetered air entering. Replacing a tired cap or seal is cheap insurance for the XV’s long‑life FB20 engine.

As part of regular servicing, it’s smart to give the oil cap a quick once‑over:

• Inspection: At each service (roughly every 10,000–12,500 km or 6 months), check the cap for cracks, heat‑wear, and a firm click or positive seat when tightened.
• Seal condition: Make sure the rubber O‑ring isn’t flattened, brittle, or missing. A light smear of clean engine oil on the O‑ring helps it seat smoothly.
• Cleanliness: Wipe the filler neck and cap threads so grit can’t drop into the engine when topping up.
• Fitment: Refit by hand only—turn until it seats, then give it a small additional nip. Avoid tools unless the cap is stuck, if needed, use a rubber strap wrench, not pliers.
• Replacement: If the cap won’t hold tight, the seal’s perished, or the marking is illegible, fit a quality replacement (genuine or OEM‑equivalent) matched to the XV’s FB20 engine.

Before starting the engine, always confirm the oil cap is back on and snug. It’s a tiny part that protects the big investment under the bonnet.

Where is the oil cap on a 2013 Subaru XV?

It’s on the top of the engine at the oil filler opening, clearly marked “ENGINE OIL” (often with SAE 0W‑20). Pop the bonnet and look for the round cap on the upper engine cover/rocker area. The Owner’s Manual engine-bay diagram points it out if needed.

What oil grade is shown on the cap, and should that always be used?

Most 2013 Subaru XV caps show SAE 0W‑20. That’s the factory‑recommended grade for the FB20 in many markets. Always follow the Owner’s Manual for your climate and fuel quality, if the manual lists alternatives, stick to those approved viscosities.

What if the oil cap is lost or stuck?

If it’s lost, don’t drive until a correct replacement is fitted—dust or debris can enter quickly. If it’s stuck, try a rubber strap wrench on a cool engine and avoid metal jaws that can crack the cap. Replace the cap if it’s damaged or the seal is past it.