I Have a 2016 Toyota Highlander and My Gas Mileage is Terrible, I Use 89 or 91 Octane, But I Don’t Need Anyone Telling Me What Grade of Gas To Use

Improving Gas Mileage for 2016 Toyota Highlander

A Toyota Highlander owner is experiencing terrible gas mileage, with a need to refuel every 2 days, and is seeking advice on how to improve it.

"My gas mileage is terrible, but I'm not changing my gasoline octane opinion."

Malachi, a 2016 Toyota Highlander XLE V6 FWD owner, shares his concerns on the Toyota Highlander Owners Club Facebook page, stating that he has to refuel every 2 days and gets 25 MPG while using 91 octane gas.

The owner is looking for advice on how to boost his mileage without changing his gasoline octane preference.

Author's Summary

Toyota Highlander owner seeks help to improve terrible gas mileage.

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Torque News Torque News — 2025-10-15

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