Mercury Grand Marquis Oil Type & Capacity

Frequently Asked Questions

What type of oil does a Mercury Grand Marquis use?

Most newer Mercury Grand Marquis models (2010+) use 0W-20 full synthetic oil. Older models typically use 5W-30. The exact specification depends on your engine — check the oil cap or owner's manual for the definitive answer.

How many quarts of oil does a Mercury Grand Marquis take?

Oil capacity for the Mercury Grand Marquis ranges from 4.0 to 6.5 quarts depending on engine size and whether you're replacing the filter. Four-cylinder engines are typically on the lower end, V6 and V8 on the higher end.

Can I use conventional oil in my Mercury Grand Marquis?

For 2010+ Mercury Grand Marquis models, full synthetic is strongly recommended (and often required). Older models can typically use conventional, but synthetic provides better protection, longer drain intervals, and improved fuel economy.

How often should I change the oil in my Mercury Grand Marquis?

Modern Mercury Grand Marquis models typically call for oil changes every 5,000 - 10,000 miles depending on driving conditions. Older models should stick to 3,000 - 5,000 miles. Severe driving (towing, extreme heat, short trips) may require more frequent changes.

What happens if I use the wrong oil in my Mercury Grand Marquis?

Using oil that's too thick can reduce fuel economy and increase engine wear during cold starts. Oil that's too thin may not protect adequately under load. For best results, always use the manufacturer-specified weight.