ssimpala1901
Active member
We had been getting 18.6 MPG running on 87 octane normal driving with no regard to gas economy, 90% of fill ups at Costco over 12,000. Watching a lot of the videos on Youtube from different Youtubers saying they run premium gas. So, for the last two fill ups we used the Costco premium, 91 octane and we went from 18.6 to 21.8 with no change in driving habits over the last 1000 miles.
2021 XL Powerboost FX4
2021 XL Powerboost FX4
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