A few people in my area have noticed a change in gasoline's fuel efficiency. Maybe a different octane rating, I'm not sure. Although the price is coming down, my push lawn mower runs out of gas sooner than usual. A friend's vehicles get about 5 MPG less in the last couple of weeks. And his zero turn mower is also running out of gas on his yard, after owning it for several years that has never happened.
Our affected equipment has been well maintained and runs smoothly. The vehicles get well over 25 MPG normally. We are in the southeast region and get gas from the same Murphy USA station.
Can anyone else concur?