The 2021 Nissan Altima SR requires a full-synthetic engine oil, with the grade depending on the engine option. The 2.5-liter engine typically uses 0W-20, while the 2.0-liter VC-Turbo engine uses 5W-30. The approximate oil capacities are about 4.8 quarts for the 2.5L and about 5.1 quarts for the 2.0L turbo. Always confirm the exact specification on the vehicle’s oil-fill cap or in the owner’s manual.
Engine options in the 2021 Altima SR
The Altima SR can be equipped with either the standard 2.5-liter four-cylinder or, in certain variants, the 2.0-liter VC-Turbo. Each engine has its own oil specification and capacity.
- 2.5L four-cylinder (non-turbo): Use a full-synthetic 0W-20 motor oil. Typical oil capacity is 4.8 quarts (about 4.5 liters) with the filter change.
- 2.0L VC-Turbo four-cylinder: Use a full-synthetic 5W-30 motor oil. Typical oil capacity is about 5.1 quarts (roughly 4.8 liters) with the filter change.
These figures can vary slightly by specific model and optional equipment; always verify the exact capacity on the vehicle’s oil specification label or in the owner’s manual.
Oil standards and what to look for
In general, use an oil that meets contemporary API specifications and ILSAC standards. For 2021 Altimas, that means API SP or later and ILSAC GF-6 or newer is acceptable. The important point is to choose a high-quality full-synthetic oil rather than conventional, and to select the grade appropriate for your engine.
- 0W-20 full synthetic oils (options from Mobil 1, Castrol, Pennzoil, etc.) for the 2.5L engine.
- 5W-30 full synthetic oils for the 2.0L VC-Turbo engine.
- Look for oil brands that list API SP or API SN and GF-6 on the label; avoid off-brand that doesn’t meet specs.
Always ensure you follow the manufacturer’s specification, as these help maintain warranty coverage and engine longevity.
Maintenance reminders
Oil-change intervals and reminders
Typical intervals with synthetic oil are around every 5,000–7,500 miles (8,000–12,000 km), depending on driving conditions and climate. Severe-duty conditions—such as frequent short trips, extreme temperatures, towing, or heavy stop-and-go driving—may require more frequent changes (often every 3,000–5,000 miles). Check your owner's manual for the exact Nissan maintenance schedule and refer to the oil level dipstick regularly.
Summary
For a 2021 Nissan Altima SR, the required oil depends on the engine. The 2.5L engine uses 0W-20 full synthetic oil with about 4.8 quarts capacity, while the 2.0L VC-Turbo uses 5W-30 full synthetic oil with about 5.1 quarts capacity. Confirm the exact specification from your owner’s manual or on the oil-fill cap, and choose a quality product that meets API SP or newer and ILSAC GF-6 standards. Regular maintenance and using the right oil will help preserve performance and warranty coverage.