Can a Lexus LS 400 run on 10W-30 oil?

Yes, a Lexus LS 400 can run on 10W-30 oil, as it is within the viscosity range that the engine can accommodate. However, it’s essential to check the owner's manual for the manufacturer's recommended oil specifications to ensure optimal performance and engine longevity. Using the recommended oil viscosity, typically 5W-30 or 10W-40 for the LS 400, is generally advisable for better engine protection.