Just drove my work commute for the first time today and averaged 29mpg according to the computer. I was pleasantly surprised, I was expecting 27, and I used to get 19 on my g37s so this is great. This was on my 50 mile roundtrip commute in L.A. traffic.
CX-5 Fuel economy
- Thread starter RickInMesa
- Start date
Oh, is it that far off? I'll compare to the computer once I do my first fill up.
I have 2014 and my computer is off by .3 miles (after 5 fill ups) on average.
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Yours is better than mine. I filled up yesterday and had a fuelly calculated 31.8. The computer said 34.5.
First fill up @ 90% stop & go, 21 mpg.
You can't judge the computer's accuracy with a single fill-up - it needs to be averaged over multiple fills to be meaningful.
Keep in mind that not even the pumps we use to fill our vehicles are perfectly accurate. Then there is the odometer (which is used by the trip computer and for manual MPG calculations). My odometer with winter tires (OEM 17" tire size) reads over 2% too low. This means both the trip computer and my manual (uncorrected) calculations are using too short of a distance traveled to calculate MPG. I do not correct my Fuelly entries to reflect this so, assuming the pumps in my area are accurate, my CX-5 is returning better MPG than reported in my Fuelly signature.
That reminds me of something that has baffled me in California. The stickers on the pumps around here say "Accuracy of this device is the responsibility of the owner/user" in small print. I always thought the seal meant they had checked the pump, while that seems to say "best of luck!"
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Agreed. I only have a few fill-ups recorded but it appears that the computer reads 0.3-0.6 mpg higher than what my hand calculations show. That's not too bad IMO.
popeyecahn
Member
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- Ex CX5 Owner
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- '23 3 PRM HB MT
I'm going to go with the 34.8 I'm seeing right now with the on board comp 
Thank you, now I am a little bit more tranquilized. Today I'm going to make my second fueling ever with my new CX-5 and dashboard shows an embarassing 12.6l/100km (18.6mpg) but with an average speed of 34kmh (21mph) due to a 85/15 city/highway ratio.
This is my first SUV and my first AT and I knew I had to learn to use them with all the up hill roads of my city, nonetheless I was rather concerned until I read your post.
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My first tank was a bit over 24 and my second was around 25. That's with about 60/40 Hwy/City driving. Hopefully the trend of it going up continues.
On the highway I'm keeping it around 70-75 (big difference from the BMW where I'd zip along at 80, safely of course). I notice that the instant gauge at the 70-75 range is reading around 27mpg. That's a pretty big drop off from the 32 rating.
The bigger annoyance to me is that I think the range to empty is very pessimistic. With both fill ups I've had so far the car has only taken 12 or so gallons, meaning there is another 2.8 left in the tank.
On the highway I'm keeping it around 70-75 (big difference from the BMW where I'd zip along at 80, safely of course). I notice that the instant gauge at the 70-75 range is reading around 27mpg. That's a pretty big drop off from the 32 rating.
The bigger annoyance to me is that I think the range to empty is very pessimistic. With both fill ups I've had so far the car has only taken 12 or so gallons, meaning there is another 2.8 left in the tank.
Air resistance is exponential as speed increases. You could probably get 32mpg at 65mph, but 75mph is a huge increase in load.
