The short answer is SAE 5W-30 engine oil that meets API certification; you can use a conventional, synthetic-blend, or full synthetic formulation. The exact oil capacity depends on which engine your Frontier has, but you’ll typically need roughly 4.5 to 5 quarts when changing the oil and filter. Always verify with your owner's manual and check the dipstick after a fill.
In 2008 the Frontier was offered with two powertrains: a 2.5-liter four-cylinder and a 4.0-liter V6. Both generally call for 5W-30, but the amount of oil required and the maintenance specifics vary by engine. The following overview breaks down what each engine needs and how to choose the right oil based on climate and usage.
Engine options and oil guidance
2.5-liter four-cylinder
The 2.5L four-cylinder typically uses SAE 5W-30 oil that meets API certification. A synthetic-blend is acceptable and full synthetic offers extra protection in extreme temperatures or with high mileage. Expect an oil capacity in the vicinity of 4.5 quarts with a filter change, though exact figures can vary by model year and configuration.
4.0-liter V6
The 4.0L V6 also commonly requires SAE 5W-30 oil that is API-certified, with synthetic blend or full synthetic options suitable for demanding driving conditions. Oil capacity for this engine is usually around 5 quarts with a filter; precise capacity depends on the specific vehicle and whether you perform any drain-and-fill variations.
Choosing the right oil: viscosity and certification
Choose oil that meets current API certification and ILSAC standards. A 5W-30 viscosity suits a broad range of temperatures, balancing cold-start protection with heat stability. In very hot climates, heavy towing, or high-mileage engines, you may opt for a synthetic or high-grade oil; always confirm the exact specification for your VIN in the owner’s manual or with a Nissan service advisor.
Maintenance reminders
Follow the recommended oil-change interval for your driving conditions. Conventional oil typically requires more frequent changes than synthetic blends or full synthetic. Regularly monitor oil level with the dipstick and adjust intervals if you drive under severe conditions, such as frequent short trips, extreme temperatures, or heavy towing.
Summary
For a 2008 Nissan Frontier, the standard recommendation is 5W-30 API-certified engine oil, with synthetic-blend or full synthetic options appropriate for climate and driving style. Engine-specific capacities are roughly 4.5 quarts for the 2.5L I4 and about 5 quarts for the 4.0L V6, plus a replacement filter. Always consult the owner's manual for your exact VIN and engine, and consider synthetic oil if you operate in demanding conditions to maximize protection and longevity.
Bottom line: use a 5W-30 oil that meets API/ILSAC standards, verify the capacity for your engine, and tailor your change schedule to your climate and usage. For the most precise guidance, refer to Nissan’s official manuals or a licensed dealer.