2017 Honda Civic Si MPG

[jakabony]

Well, my coupe will be here till next Friday... It's not that bad, at least where I'm driving...and...we have hill-hold...

Yeah it just seems that less and less people want a manual transmission. Personally, I couldn't wait to have one again. Driving is fun again.

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[Monocacy]

For the first two tanks of gas I have been getting 37 – 38 mpg slogging through DC rush hour traffic. Most of my drive is on the interstate, with a mix of cruising and stop and go. Commute is about 25 miles each way.

If I leave work late and avoid traffic, trip computer says I’m getting around 42 – 43 mpg. I was hoping for the mid 30s, so the fuel economy has been a very pleasant surprise.

 

[runnin9z]

Just averaged 40 mpg on a 500 miles road trip. Was a fair amount of traffic as well. On a day to day basis i get about 28-29 mpg with mixed city/highway with traffic

 

[Old guy]

Just filled up for the third time. Car said 38.2mpg, actual was 37.43mpg. So like the last tank, the car is off by .8mpg. Filled as soon as the low fuel light came on, car took 10.3 gallons, so a 2 gallon buffer. Last time it was 1.5 gallon buffer. Kind of strange.

Anyway, 45/55 city/highway, 88 octane, E15 gas. This tank I filled with 91 octane, E10 premium. I guess I'll see if it feels more powerful and what kind of mpg I get.

Still love this car to death. So glad I bought it.

 

[ChrisSi]

My last tank I filled with Sunoco 93, and I have been getting 3-4 more mpgs than with other brands or lesser octane.

91/93 octane without ethanol will always get better mileage than 87 octane E10 since it has more energy. This engines ability to adjust timing and burn that fuel more efficiently doesn't hurt either, but ethanol is a hindrance to efficiency just on it's own.

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