The Lexus IS350 typically requires synthetic 5W-30 motor oil, but the exact grade can vary by year and market. Always confirm the correct specification for your vehicle from the owner's manual or the engine oil cap.
Oil type basics for the IS350
Here is a quick guide on the oil type you should use, focusing on the most common configurations and the caveats you should know before an oil change.
- Most IS350 models with the 3.5-liter V6 (2GR-FSE) use synthetic 5W-30 motor oil as the standard viscosity in many markets, including the United States.
- In some markets and under certain climate conditions, Lexus approvals include 0W-20 or 0W-30 as alternatives to 5W-30.
- Always use a high-quality synthetic oil that meets the latest ILSAC or API specifications and adhere to the recommended grade to preserve warranty and engine protection. Do not mix grades.
Bottom line: 5W-30 synthetic is the default for many IS350s, but verify the exact grade for your vehicle's year and region by checking the owner's manual or the oil filler cap.
Year-by-year and climate considerations
The IS350's 3.5-liter V6 engine (2GR-FSE) has seen revisions across model years. While 5W-30 has been the standard for most US-spec cars, Lexus has approved other viscosities for certain markets and engines. Always reference the official documentation for your specific vehicle.
How to verify quickly
To confirm the exact specification for your car, the fastest checks are: look at the oil filler cap on the engine; inspect the owner's manual's maintenance section; or contact a Lexus dealer with your VIN for the precise grade and spec.
Practical tips for a healthy oil change
When preparing for an oil change, use synthetic motor oil of the grade specified for your IS350, replace the oil filter, and ensure the drain plug torque and filter torque are correct. If you're unsure, have a trained technician perform the service to avoid under- or over-lubrication.
Summary
The Lexus IS350 typically requires synthetic 5W-30 oil, but the exact grade can vary by year and market. Always verify with the owner's manual or engine cap, and use a high-quality synthetic oil that meets current specifications.
Can I run 5W30 instead of 0w20?
Modern engines designed for 0W-20 oil require specific viscosity for optimal performance, and using thicker 5W-30 oil may compromise efficiency while potentially voiding manufacturer warranties.
Does it matter if I use 5W-30 or 5W-40?
The key difference between 5W30 and 5W40 engine oils is their high-temperature viscosity. 5W30 is thinner at operating temperature, offering better fuel efficiency, while 5W40 is thicker, providing enhanced engine protection under high loads, long-distance driving, or hot climates.
What oil do you put in a 350 Z?
Mobil 1 – High Mileage 10W-30 Full Synthetic Motor Oil, Extends Engine Life, 5 Quart (Part No. 14995)
What oil is recommended for Lexus IS350?
Castrol – Edge 0W-20 Full Synthetic Motor Oil, Superior Wear Protection, 5 Quart (Part No. 1597B2)