Tech Tip: Starting with the 2010 Model Year, Lexus began a gradual transition to the use of synthetic 0w-20 viscosity engine oil. There are multiple benefits of this oil, including: Reduced friction and wear on engine surfaces, improved fuel economy, Reduction in waste oil stream (in vehicles approved for 10,000 mile oil change intervals), Reduced maintenance cost (in vehicles approved for 10,000 mile oil change intervals). Due to the improved performance and durability of 0w20 synthetic oil, Lexus has extended the oil change intervals to 10,000 miles for vehicles that require this oil. With this change, the following should be noted: Only Lexus vehicles in which 0w20 oil is mandatory have been approved for the extended oil intervals. Vehicles in which 0w20 is an option to 5w20 (or 5w30) will continue to require 5,000 mile change intervals, even if 0w20 oil is used. In the case of vehicles with 10,000 mile oil change intervals, the 5,000 mile service interval has not been eliminated. The traditional 5,000 maintenance procedures (such as tire rotation) will continue to be required, and the fluid levels (including engine oil) will need to be checked and adjusted at this time. If the vehicle operation meets the standard criteria for "Special Operating Conditions" such as: driving off road, on dirt roads, towing a trailer, making repeated short trips under 32°F, or extensive idling; the engine oil must be replaced at 5,000 mile intervals, regardless of oil specified.