2.5T Fuel Economy - Page 2 - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #11 of 22 (permalink) Old 08-09-2018, 08:19 AM
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Divide miles driven by gallons used. Boom. Simple math.

I'll add that keeping a record of this also helps track performance of the car. The car's computers have gotten better, but a ton of data figured with good, old fashioned math is a great resource.

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post #12 of 22 (permalink) Old 08-09-2018, 01:04 PM
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I use fuelly to record my fillups and my average mpg so far, is at 22.3 over the last 7 fills. Mostly city driving here in Irvine with 45-55mph speed limits and lots of stop and go from all the signals I hit and a/c always running.

Last edited by Dougspeed; 08-09-2018 at 01:08 PM.
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post #13 of 22 (permalink) Old 08-09-2018, 03:37 PM
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So almost no penalty in MPG with more power over the 16? Sounds like a win to me.


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Correct. Very little penalty for turbo with regard to MPG. I should add though, I only use 92 octane (93 not available in my area). On the 16' 6 I only used regular. There is a bit of penalty for gas cost.
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post #14 of 22 (permalink) Old 08-10-2018, 07:21 AM
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Originally Posted by Dougspeed View Post
I use fuelly to record my fillups and my average mpg so far, is at 22.3 over the last 7 fills. Mostly city driving here in Irvine with 45-55mph speed limits and lots of stop and go from all the signals I hit and a/c always running.
I concur, I drive almost the same type of route and speed. If my car is on, so is the A/C. Getting 22.5 mpg also.
Look forward to an all highway trip in cooler temps with a/c off, to see why type of mpg can be obtained.
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post #15 of 22 (permalink) Old 08-29-2018, 05:44 PM Thread Starter
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Just for kicks, I ran my fuel tank below zero-mile range (maybe drove an extra 5 miles or so), and filled up with 90-octane, zero-ethanol gasoline.

I've been averaging 26 MPG on 93-octane up until now, it'll be interesting if/how much that goes up (or down)...


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post #16 of 22 (permalink) Old 08-29-2018, 07:33 PM
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Originally Posted by Mz6GreyGhost View Post
Just for kicks, I ran my fuel tank below zero-mile range (maybe drove an extra 5 miles or so), and filled up with 90-octane, zero-ethanol gasoline.

I've been averaging 26 MPG on 93-octane up until now, it'll be interesting if/how much that goes up (or down)...
It would be very interesting to note what sort of fuel economy you get with etanol-free fuel. In my experience. fuel economy improved considerably and was much more consistent with aggressive driving.

You got about 5L of fuel left when the gauge reads completely empty, BTW.
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post #17 of 22 (permalink) Old 08-29-2018, 09:26 PM
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My signature on fuelly hand calculated*

Due to my current consulting job, I've burned ONE tank of fuel since January 31- August 18!

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post #18 of 22 (permalink) Old 08-29-2018, 09:31 PM
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My signature on fuelly hand calculated*

Due to my current consulting job, I've burned ONE tank of fuel since January 31- August 18!
Psst, this thread is for the MPG for just the 18 2.5 Turbo motors not the 17 and older n/a models.
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post #19 of 22 (permalink) Old 10-01-2018, 05:36 AM
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Got 7.3L/100km on a 80km 80% highway trip. But in the city I'm getting closer to 12l/100km
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post #20 of 22 (permalink) Old 10-01-2018, 11:25 AM
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I've hand calculated 29.7 in the time I've owned the car (May until now), but I do a lot of highway driving for work. I'm usually around 75/25 highway vs. city. My leadfoot tendencies around the city will drop that figure on the weekends.
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