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Discussion Starter · #1 ·
At 800 miles now. Cruising 75 mostly highway commute I was getting around 39mpg. Using 87 octane non-E10.

At 70mph is improved to 40-41mog RPMs stay under 2000 most of the time.

With a 10mph tailwind I got 48mpg at 70.

Tomorrow I have to go into to work. Might try 65mph but at that speed you start getting passed by semis.
 

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I have a 16' Ex-T and I use mid-grade (90) and noticed a couple extra MPG's .. I was going 70-75 too with about the same as you but now I have slowed down to 62-65 and get 48-50 consistently. It is weird to drive in the slow for a change and a majority of the time I end up passing those who have passed when it gets congested.
 

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Until I had a $30,000 oil change today, I had a 2016 LX with sensing on it. I just did a drive From Columbus Ohio to Memphis TN and averaged 43-44MPG going at average 75-83 with cruise control on. I say average because there were times I went as high as 98MPH due to traffic. I left my house with a full tank of gas, made it about 40-50 miles west of Nashville and filled up with the car saying I had 60 miles left on the tank. I drove clear to West Memphis Arkansas and then made it as far as Franklin KY and filled up, the car said I had 54 miles on the tank remaining, then made it home and was at around half a tank.

I used ECON and adaptive cruise control the whole time, Air Conditioner was ran as well.
 
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