Toyota Highlander 2.4T 2023 – Air Filter Replacement Boosted My Mileage!

Hey everyone! Just wanted to share how replacing my air filter early (around 23,000 miles) noticeably improved my gas mileage. I’ve seen an increase of at least 3 mpg in city/highway combined driving (70% city, 30% highway). Highlander 2.4T owners, you might want to check your filters too!

We have a 2024 2.4T loaner while my 2021 is getting a transmission replaced under warranty. The 2024 gets 26.5 mpg, and my 2021 was averaging 25.5 mpg. My wife is a pretty light driver, mostly commuting 30 miles (26 highway, 4 city). I honestly expected the 2.4T to do better than this. I miss having the V6.

How do you check that screen? My lifetime average is 22 mpg after 19,000 miles. I replaced my filter with an OEM one. What did you replace yours with?

I had 34.3 mpg driving to Long Island on a smooth road, no wind, and mild temperature, driving at about 65 mph. I use premium gas and drive calmly.

I used a Fram filter.

Got it! My driving is mostly short freeway trips (5-10 miles), so I guess I’m not getting true freeway mileage.

I have a 2022 V6 and usually get 25-29 mpg in combined driving here in Auckland, New Zealand.

Honestly thought the 4-cylinder would get better mileage. My V6 non-hybrid Highlander does about the same or sometimes better in daily driving.

I’m based in NYC.

I’m in NYC too and drive a hybrid. I noticed that my mpg doesn’t match the high numbers others mention during local trips, but I get over 40 mpg when I go upstate or out of state. It’s probably just a difference in driving conditions.

I’m in Toronto and work downtown. Doesn’t seem to make much difference where you are; it’s more about how you drive.