Honda Civic Sport Hatchback 6MT Gas Reduction?

nothome17

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Maybe you've gained a few pounds? LA has a lot of good places to eat.
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VarmintCong

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Hey guys, I bought my 2019 Honda Civic Hatchback Sport 6MT last December and I love it so far, first time driving a manual ever. Recently I noticed that when I fill up gas it is now less miles. I used to be able to get 410-416 miles per full tank. Now when I pour gas, it goes up to 390-395. Any reason for this issue? My gas mileage has also gone down from 36.8 mpg to 33.7 mpg. I am driving in economy mode most of the time and I'm driving at the gear/rpm ratio. I really don't speed with this car either. The only difference between these timeframe is that I did the most recent oil change while the first time was with Honda Service. I used Mobil 1 Full Synthetic 0-20W and Ultra Fram Oil Filter.

Has anyone had issues like this? Should I take this to the honda center and have this issue addressed? Thanks for reading and open to any suggestions/thoughts/comments.
My gas mileage has dropped in the last year or so, going from 50k to 75k miles - the real gas mileage, not the computer number. My calculated mileage has dropped from around 38 to 36 mpg, and highway trips where I used to get 42 mpg now are like 38 mpg.

Your car is new so maybe not the same issue - I have noticed a difference in gas too, Shell 93 has always gotten me better gas mileage. Not sure about 87 vs 93, I haven't used 87 much cause the car feels sluggist on 87.

I don't use Speedway, cause last time I filled up, the meter showed I put like 12.9 gallons in the tank, when I'm sure it had at least a half gallon left. Same thing when I used Speedway a month later, so it wasn't a one-time thing. That's probably how they sell gas so cheap, they cheat on the gallon meters.
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