SAE 5W-30 engine oil is the standard choice for most Lexus LS 400 models.
The exact grade can vary by year and climate; consult the owner's manual for climate-specific guidance and capacity. This article explains the recommended oil types, capacity, and maintenance intervals for the LS 400's 1UZ-FE engine.
Oil type and viscosity for the LS 400
The LS 400 uses the 1UZ-FE V8 engine. For normal driving in a standard climate, Toyota/Lexus guidance typically calls for SAE 5W-30 engine oil. Oil should be API-certified (for example API SN or newer) and can be conventional or synthetic. Synthetic oil is commonly recommended for longevity and easier cold starts, especially in aging engines.
Common viscosity options by climate and operating conditions:
- 5W-30, API SN/SM (synthetic or conventional): The standard recommendation for typical temperatures and driving conditions.
- 10W-30, API SN/SM: Useful in unusually hot climates or when an engine uses slightly more oil due to wear.
- 0W-30: Synthetic option recommended for cold-weather starts and very low-temperature operation; compatible with the 1UZ-FE when approved by your manual.
In most conditions, 5W-30 remains the baseline recommendation. Adjust the grade based on climate, engine condition, and driving habits, and always use an API-certified oil.
Oil capacity and maintenance notes
The LS 400's oil capacity with filter is roughly 5.5 to 6 quarts (about 5.2 to 5.7 liters). Exact capacity varies by model year and filter size, so check the manual or the dipstick during an oil change to confirm the correct fill level.
When planning oil changes, general guidelines based on oil type are as follows:
- Conventional oil: typically every 3,000–5,000 miles (4,800–8,000 km).
- Synthetic oil: typically every 5,000–7,500 miles (8,000–12,000 km).
These intervals are starting points. Always follow the maintenance schedule in your specific manual and consider driving conditions, climate, and how the vehicle has aged.
Practical tips for LS 400 owners
Use a high-quality, API-certified oil and a compatible filter. If you’re unsure about the exact grade for your year or market, consult your owner’s manual or a Lexus service department. Keeping to the recommended viscosity and changing the oil at appropriate intervals helps preserve the 1UZ-FE’s performance and longevity.
Summary
For the Lexus LS 400, the standard oil is SAE 5W-30 (conventional or synthetic) with API certification. A 5W-30 is suitable for most environments, while 10W-30 or 0W-30 can be considered for hot climates or very cold climates, respectively. The oil capacity is about 5.5–6 quarts with filter, and maintenance intervals typically range from 3,000–7,500 miles depending on oil type and conditions. Always verify the exact specifications in your year’s owner's manual and adhere to the recommended service schedule.