Does the Lexus IS 350 use synthetic oil?
The IS 350 generally uses full synthetic motor oil, with 0W-20 as the most common specification in modern models; some older years or regional variants may call for 5W-30. Always confirm with your owner's manual or the oil cap.
Beyond that quick answer, this article explains the current oil requirements for the IS 350, how they vary by year and market, how to verify the correct grade for your car, and best practices for maintenance and oil changes.
Oil requirements by year and market
Before listing the typical grade-for-year details, note that exact specifications can vary by model year, engine variant, and local climate. Always verify with the owner's manual or the VIN-specific service information.
Typical grade and specifications
- Most recent Lexus IS 350 models use SAE 0W-20 full synthetic oil as the standard grade, designed to meet ILSAC GF-5/GF-6 and API service requirements.
- In some earlier IS 350 years or certain regional markets, SAE 5W-30 synthetic oil may be specified or accepted, especially where 0W-20 was not offered at the time.
- Regardless of grade, use oil that meets the vehicle's specification printed in the owner's manual or on the oil cap, and avoid off-spec blends.
In practice, synthetic oil is the norm for the IS 350, with 0W-20 being most common in modern examples; always verify for your specific vehicle.
How to verify your IS 350 oil specification
To ensure you are using the correct oil for your IS 350, use these verification steps:
- Consult the owner's manual for the exact grade (0W-20 or 5W-30) and the recommended specification (ILSAC GF-5/GF-6, API service level).
- Inspect the engine oil cap; many Lexus engines indicate the preferred viscosity there.
- Ask a Lexus-certified technician or check the vehicle's service information system for your VIN to confirm market-specific requirements.
- When in doubt, use a high-quality full synthetic 0W-20 that meets the stated spec if your manual allows it.
Using the correct oil helps protect the engine and supports fuel efficiency and warranty compliance where applicable.
Service intervals and best practices
For most modern IS 350s, Lexus recommends synthetic oil changes at intervals up to 10,000 miles (16,000 km) under normal driving. In severe or extreme conditions—hot climates, frequent short trips, heavy loads, or towing—more frequent changes (often 5,000–7,500 miles) may be advised. Always follow the schedule shown in the vehicle's information display and manual.
Summary
The Lexus IS 350 is designed to run on synthetic oil, with 0W-20 being the default in current models and 5W-30 appearing in older or certain markets. Verify for your exact vehicle and follow the recommended service intervals to maintain performance and longevity.
