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What are the best aftermarket modifications for improving fuel efficiency in a Toyota Highlander?

I recently purchased a Toyota Highlander and I am looking for ways to improve its fuel efficiency. Are there any aftermarket modifications that can help me achieve better MPG without sacrificing performance?

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First, make sure your tires are properly inflated. This can significantly improve fuel efficiency. Next, consider installing a cold air intake to help increase air flow to the engine. Additionally, switching to a high flow exhaust system can also improve fuel efficiency. Finally, keeping your vehicle well-maintained and regularly changing the air filter can also have a positive impact on MPG.

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Instead of adding modifications, try changing your driving habits. Avoid excessive idling and hard accelerations. Also, using cruise control on the highway can help maintain a consistent speed and improve fuel efficiency. Lastly, consider removing any unnecessary weight from your vehicle as this can also affect MPG.

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One simple modification you can make is installing a performance chip. This can help optimize engine efficiency and improve fuel economy. You can also try adding a fuel additive to your gas tank to help clean and improve the engine's performance. And don't forget to regularly check and replace your spark plugs for optimal fuel efficiency.