Parts for your 2016 Mitsubishi Asx-Oil cap

2016 Mitsubishi ASX oil cap — what it does and how to look after it

Technical sources confirm the 2016 Mitsubishi ASX is fitted with an oil filler cap and it’s absolutely relevant to routine servicing. The Mitsubishi Motors 2016 ASX Owner’s Manual shows the oil filler cap location under the bonnet and instructs removal for topping up engine oil. The factory Workshop Manual (Lubrication section) also specifies refitting the cap and checking its seal after oil changes, and the Mitsubishi parts catalogue lists a dedicated oil filler cap for petrol and diesel ASX variants. So yes, the ASX uses an oil cap and it matters.

The oil cap seals the top of the engine’s oil filler neck, keeping dust and moisture out while containing oil vapours and splashes within the rocker cover. On modern engines, a properly sealing cap helps the positive crankcase ventilation (PCV) system maintain the correct airflow, which supports smooth idling and clean emissions. If the cap’s seal is tired or the cap is loose, oil can mist onto the engine, and unmetered air can sneak into the crankcase path, sometimes causing a rough idle or warning lights.

As part of regular servicing on a 2016 Mitsubishi ASX, the oil cap deserves a quick check. Make sure it tightens down smoothly by hand until it seats firmly. Inspect the rubber seal for flattening, hardening, splits or swelling. Wipe the cap and filler neck so grit can’t fall into the engine when the cap comes off for top-ups. If the seal looks suspect—or if the cap feels wobbly—replacement is cheap insurance against mess and potential drivability issues.

• Time to replace the cap if there’s oil weeping around the filler neck
• Cap won’t tighten or the tabs are cracked
• Persistent oil smell after drives or visible oil mist on the cover

Choose an OE-spec, non-vented cap with the correct seal profile for the ASX. Avoid over-tightening, it’s designed to be hand-tight only. If the cap goes missing, don’t keep driving—oil can fling out, level can drop quickly, and contaminants can enter the engine. Fit a correct replacement promptly and check the oil level afterward.

A 30-second cap inspection at each scheduled service helps keep the ASX tidy, leak-free, and running sweet as.

Popular questions about the 2016 Mitsubishi ASX oil cap

Where is the oil cap on a 2016 Mitsubishi ASX?
It sits on top of the engine’s rocker cover under the bonnet, clearly marked with the oil can symbol and often “Engine Oil.” Twist anti-clockwise to remove and clockwise to refit.

Wipe around the area before opening so no grit drops into the engine, then refit the cap hand-tight until it seats firmly.

Is it safe to drive without the oil cap?
No. Driving without the cap can spray oil around the bay, drop the oil level, and let dirt or moisture into the engine. That can risk engine damage and make a real mess.

If the cap is missing or broken, switch off, source a correct replacement, and check the oil level before setting off again.

How often should the oil cap be replaced?
There’s no fixed interval. Inspect the cap and seal at every service and replace if the seal is hard, cracked, flattened, or if the cap no longer tightens properly.

Given the low cost, many techs swap the cap proactively when signs of seepage appear, or any time the seal looks tired.