Most 2004 Infiniti models use SAE 5W-30 engine oil, which can be synthetic or conventional. The exact viscosity and specifications can vary by model and climate, so it’s best to check the owner’s manual or the oil filler cap for the definitive recommendation.
Understanding the question and common answers
Infiniti’s 2004 lineup included several engines across different models, notably the VQ35DE 3.5L V6 in the G35, FX35, and I35, and the VH45DE 4.5L V8 in the Q45. While 5W-30 is the standard starting point for most of these engines, particular climates or driving conditions can call for slight variations. The most reliable source remains your specific vehicle’s owner's manual or the oil cap on the engine.
Common 2004 Infiniti engines and oil guidance
The following guidance covers the most widely used engines in 2004 Infiniti models. If your exact model differs, refer to your manual or contact a dealership for the precise specification.
- VQ35DE 3.5L (found in G35, FX35, I35, etc.): SAE 5W-30 oil; synthetic or conventional; API service level at least SJ/SL or higher; compatible with ILSAC guidelines when using synthetic oil.
- VH45DE 4.5L (found in Q45): SAE 5W-30 oil; synthetic or conventional; API service level at least SJ/SL or higher.
In practice, 5W-30 is the most common recommendation for these engines, and synthetic oil is often preferred for better protection and colder starting performance. Some climates or engines may allow 10W-30 or other viscosities, but always verify with the manual.
Why the exact specification matters
Using the wrong oil viscosity or an incompatible oil specification can affect engine protection, fuel efficiency, and warranty coverage. Infiniti engines from that era were designed around specific viscosities and API/ILSAC standards, so sticking to the recommended grade helps maintain reliability and performance. If you’re unsure, consult a qualified Infiniti technician or dealer.
How to verify quickly
To confirm the correct oil for your exact car, check the oil fill cap on the engine (it often lists the recommended viscosity) and review the vehicle’s owner’s manual. If you don’t have the manual, you can look up your model and engine code online or call a dealer for the official specification.
Summary
In most cases, a 2004 Infiniti takes SAE 5W-30 engine oil, with either synthetic or conventional formulations. Verify the exact viscosity and API/ILSAC specification for your specific model and climate in the owner’s manual or on the oil fill cap. Regular oil changes with the recommended oil help keep engines like the VQ35DE and VH45DE running smoothly.
What type of oil does a 2004 Infiniti take?
AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil.
Is 5W-30 good for older engines?
5W30 offers better high-temperature protection. It's great for towing, highway driving, or older engines, especially for drivers in Frandor and Lansing who use their vehicles for more than just errands. 5W20 is thinner and generally suited for newer engines that prioritize efficiency.
Does Infiniti take 5W-30?
What is the Recommended Oil for the INFINITI QX60? The INFINITI QX60 recommended oil varies by model year. For 2023 vehicles and newer, the automaker suggests 0W-20 full synthetic oil, while older models will likely need 5W-30 full synthetic oil.
What oil does a 2004 Infiniti FX35 take?
SAE 5W-30
Oil Grade: SL
| Viscosity: | 10W-30, 10W-40 (Above -18°C) 5W-30 (All TEMPS) - SAE 5W-30 is preferred. |
|---|---|
| Capacity: | 5 quarts (with filter). After refill check oil level. |
| Torque: | 25 ft/lbs (Oil Drain Plug) |