The best way to keep your 3rd generation 2014, 2015, 2016, 2017 and 2018 Toyota Highlander SUV running reliably is to change the motor oil and replace the oil filter at least every 5,000 miles or every 6 months. Check out my DIY tutorial for the procedure on the 2GR-FE or 2GR-FKS engines (with the compatible replacement filter part numbers) by clicking on the text link or thumbnail image below.