The 2021 Nissan Altima 2.5 L engine takes about 5.1 quarts of engine oil when you replace both the oil and the filter. If you only replace the oil and leave the filter in place, you’ll need roughly 4.7 quarts. Always verify with the dipstick and consult the owner’s manual to confirm the exact amount for your vehicle.
This capacity reflects the official specification for the 2.5 L inline-4 used in the 2021 Altima. Variations can occur based on production tolerances, drain procedure, and whether you’re changing the filter. The typical oil grade for this engine in the United States is 0W-20 synthetic, but always follow Nissan’s recommendations for your region and driving conditions.
Official capacity for the 2021 Altima 2.5 L
Use the figures below as a quick reference when planning an oil change. The numbers assume a full drain and a new filter; if you reuse the existing filter, the total will be slightly lower.
- With oil filter: 5.1 quarts (approximately 4.8 liters)
- Without oil filter (oil only): about 4.7 quarts (approximately 4.4 liters)
Conclusion: For a standard full oil change including a new filter, plan for about 5.1 quarts. If you are only replacing the oil and not the filter, you’ll typically need around 4.7 quarts. Begin by adding a conservative amount and then top up to the correct level using the dipstick.
Practical notes on oil type and procedure
Nissan generally recommends 0W-20 synthetic oil for the 2.5 L Altima engine in most markets. Always use the oil grade specified in your owner’s manual and replace the oil filter with every change. After filling, run the engine, check for leaks, and recheck the oil level with the dipstick to ensure you’re at the correct mark.
Summary
The 2021 Nissan Altima 2.5 L typically requires 5.1 quarts of engine oil with a new filter, or about 4.7 quarts if the filter isn’t replaced. Use 0W-20 synthetic oil as recommended, and always confirm the exact capacity for your vehicle via the owner’s manual and dipstick measurement.