What oil does a Lexus SC400 take?
The SC400’s 1UZ-FE V8 uses about 6 quarts of engine oil, with 5W-30 as the default viscosity for most climates and 10W-30 as a suitable alternative in very hot conditions or for older engines. Use an oil that meets current API and ILSAC standards, and you can choose either conventional or synthetic-blend formulations. Always verify the exact specification for your year in the owner's manual or with a Lexus dealer.
Oil type and capacity
The 1UZ-FE engine in the SC400 shares its lineage with the LS400, and the total oil capacity is roughly 6 quarts (about 5.7 liters) including the oil filter. When performing an oil change, replace the filter and ensure the drain plug gasket is in good condition.
To help guide the choice, here are common viscosity options used by SC400 owners.
- 5W-30 synthetic or synthetic-blend oil — recommended for most climates, balancing cold-start performance and protection.
- 10W-30 conventional or synthetic-blend oil — acceptable in very hot climates or if a thicker oil is preferred for older engines.
- Ensure the oil meets current API/ILSAC standards (look for the latest API service classification and ILSAC rating on the bottle).
In short, default to 5W-30 for routine use, and adjust only for climate or engine condition. Always verify the exact specification in your owner's manual or with a Lexus service adviser.
Choosing the right oil for your climate
Climate influences viscosity choices. In temperate, year-round driving, 5W-30 is typically ideal. In hotter regions or under heavy-load conditions, you may opt for 10W-30 or a high-mileage formulation if recommended by your mechanic. Regardless of climate, select an oil that meets current API/ILSAC standards and is compatible with the 1UZ-FE engine.
Maintenance and where to buy
Use a quality oil filter (OEM or equivalent) and purchase from reputable retailers. For model-year variations, consult the owner's manual, a Lexus dealer, or a trusted service shop to confirm the exact capacity and specification for your SC400.
Summary
The Lexus SC400 takes about 6 quarts of engine oil, with 5W-30 as the default viscosity for most climates and 10W-30 as an alternative in very hot climates or for older engines. Oil should meet current API/ILSAC standards, and both conventional and synthetic-blend oils are acceptable. Always verify the exact specification for your year and region in the owner's manual or with a dealer.
