Does the Lexus RX 350 require synthetic oil?
Yes. Current Lexus RX 350 models are designed to run on 0W-20 synthetic engine oil (or an equivalent synthetic grade meeting ILSAC GF-5 or newer). When synthetic oil is used, the typical change interval is about every 10,000 miles, though exact intervals can vary by year, trim, and driving conditions.
What the owner's manual specifies
Official documentation for the RX 350’s 3.5-liter V6 outlines the oil grade and maintenance intervals. While exact wording can vary by model year and market, the standard specification across recent years is 0W-20 synthetic oil that meets ILSAC GF-5 or newer, with an oil life monitoring system guiding when changes are due. Always consult your specific year’s manual or the information label under the hood for the precise requirements.
Oil grade and viscosity
Key specifications you should follow when choosing oil for the RX 350:
- Viscosity: 0W-20
- Type: Full synthetic (preferred); synthetic blend acceptable if full synthetic is unavailable, but switch to full synthetic at the next change
- Specifications: Meets ILSAC GF-5 (or newer) and API SN (or newer)
- Capacity: Approximately 5 quarts with filter; verify exact capacity in the owner’s manual for your year/model
- Monitoring: The vehicle uses an Oil Life Monitoring System to indicate when an oil change is due
Bottom line: use 0W-20 full synthetic that meets GF-5 or newer; this helps maximize protection and efficiency.
Service intervals and driving conditions
Oil change intervals depend on the oil type and how the vehicle is driven. The RX 350 employs an oil life monitor that estimates when service is needed, but typical benchmarks are as follows:
- With full synthetic oil: about 10,000 miles (16,000 km) or 12 months, whichever comes first
- With conventional oil: about 5,000 miles (8,000 km) or 6 months
- Under severe driving (towing, heavy dust, extreme heat or cold): shorten intervals accordingly
Always follow the Oil Life Monitoring System and the maintenance schedule shown on the dash or in the owner's manual for accuracy.
Practical tips for owners
These guidelines help ensure the oil matches Lexus specs and supports warranty coverage:
- Choose oil that meets ILSAC GF-5 or newer; look for API SN or newer specifications
- Use a high-quality OEM-approved filter and manufacturer-approved filters
- Keep receipts and service records to document maintenance for warranty purposes
- When in doubt, consult a Lexus-certified technician or dealership for the correct specification and interval
Adhering to Lexus specifications helps protect the engine and maintain warranty coverage.
Summary
The Lexus RX 350 is engineered to run on 0W-20 synthetic engine oil, with full synthetic being the preferred option. Always verify the exact requirements for your model year in the owner's manual and rely on the Oil Life Monitoring System to guide changes. If you’re unsure, consult a Lexus service technician to confirm the correct oil type, viscosity, and service interval.
