In short, Toyota specifies SAE 0W-20 full-synthetic engine oil for all 2016 Highlander engines, including the 2.7L inline-4, the 3.5L V6, and the Hybrid powertrain. This oil grade is chosen to optimize efficiency and engine protection across typical climates.
Engine options in the 2016 Highlander
The 2016 Highlander offered three powertrains. Regardless of which one you have, the recommended oil is 0W-20 synthetic.
- 2.7-liter inline-4 engine — recommended oil: 0W-20 synthetic
- 3.5-liter V6 engine — recommended oil: 0W-20 synthetic
- Hybrid powertrain (2.5-liter Atkinson-cycle engine paired with electric motors) — recommended oil: 0W-20 synthetic
Bottom line: Toyota’s specification for the Highlander in 2016 did not vary by engine variant; all models require 0W-20 synthetic oil, not thicker grades like 5W-30 or 10W-40 as a general rule.
Oil grade specifics and maintenance guidance
Understanding the oil grade helps ensure proper protection and efficiency. The Highlander’s 0W-20 synthetic oil is compatible with the vehicle’s emissions system and is designed to perform across typical U.S. climates.
Climate and maintenance notes
Check the owner's manual or with a Toyota dealer for any climate-specific notes. If you live in extreme heat or cold, or do a lot of short trips, follow the maintenance minder advised intervals. When in doubt, use Toyota Genuine Oil or an equivalent that meets Toyota standards (API SN or newer, ILSAC GF-5 compliant) and replace the oil filter at the same time.
Summary
The 2016 Toyota Highlander uses 0W-20 full-synthetic engine oil for all engine variants (2.7L I4, 3.5L V6, and Hybrid). Always confirm with your owner's manual or dealer, adhere to prescribed oil-change intervals, and use a compatible filter and oil that meets Toyota's specifications.