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2023 CX-50 2.5 Turbo Premium Plus
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Discussion Starter · #1 ·
Here are my numbers on running a full tank of 91 (Top Tier) in the turbo. For reference, I live in San Diego which is very hilly driving which is not what most people think. I drove 50/50 highway/city at average highway speeds 70-75, used i-stop, and drove somewhat conservative. No heavy accelerations from start and no need to floor it to get out of a dangerous situation (Obviously would have if needed). Basically didn't drive it like I stole it or an @sshole.

Miles drove at fillup = 339.7
Gallons filled to auto-shutoff (no top off) = 12.89
Average MPG = 26.35

I'm going to do this for three tanks to get a solid average.

On one of my going to work trips (25 miles one-way 90% highway), heading from the inland toward the ocean so mostly decreasing in altitude, I averaged 32 MPG.

It's not hard to reach or exceed the advertised MPG with the turbo or NA. You just have to be a conscious driver with your right foot.
 

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2023 CX-50 2.5 S Premium Plus
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I’ve got a Premium Plus non-Turbo. After 300 miles I’m getting a consistent 24.3 mpg in my hilly suburban/rural/city environment with lots of up-down and stop-go. But to get that I need to rely heavily on the cruise control. (Which I’m really enjoying btw.) I drop about .5 to 1 mpg when I try to baby things myself with the gas pedal. It’s pretty uncommon for me to see cylinder deactivation. There’s a lot of demand for the engine where I drive. But it’s pretty cool when it does kick in. And it doesn’t take a very heavy foot at all to knock the average mpg down to 22. I haven’t done enough highway driving yet to make a real difference, just the 3 or 4 exits to the supermarket and back every now and then. I’m optimistic I’ll easily see 30+ mpg (if I want to) when I have reasons for longer highway runs.

Here are my numbers on running a full tank of 91 (Top Tier) in the turbo. For reference, I live in San Diego which is very hilly driving which is not what most people think. I drove 50/50 highway/city at average highway speeds 70-75, used i-stop, and drove somewhat conservative. No heavy accelerations from start and no need to floor it to get out of a dangerous situation (Obviously would have if needed). Basically didn't drive it like I stole it or an @sshole.

Miles drove at fillup = 339.7
Gallons filled to auto-shutoff (no top off) = 12.89
Average MPG = 26.35

I'm going to do this for three tanks to get a solid average.

On one of my going to work trips (25 miles one-way 90% highway), heading from the inland toward the ocean so mostly decreasing in altitude, I averaged 32 MPG.

It's not hard to reach or exceed the advertised MPG with the turbo or NA. You just have to be a conscious driver with your right foot.
 

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I’ve got a Premium Plus non-Turbo. After 300 miles I’m getting a consistent 24.3 mpg in my hilly suburban/rural/city environment with lots of up-down and stop-go. But to get that I need to rely heavily on the cruise control. (Which I’m really enjoying btw.) I drop about .5 to 1 mpg when I try to baby things myself with the gas pedal. It’s pretty uncommon for me to see cylinder deactivation. There’s a lot of demand for the engine where I drive. But it’s pretty cool when it does kick in. And it doesn’t take a very heavy foot at all to knock the average mpg down to 22. I haven’t done enough highway driving yet to make a real difference, just the 3 or 4 exits to the supermarket and back every now and then. I’m optimistic I’ll easily see 30+ mpg (if I want to) when I have reasons for longer highway runs.
I get the same dude and I'm hauling ass everywhere in my non turbo as well. Right now I'm at 23.
 

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I’ve got a pretty decent commute (48 miles one way, hilly for most and through city/hilly terrain) I’ve been averaging about 26.9 mpg on these commutes, i drive the turbo engine, keep the cruise control on for the highway parts.
 

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2023 CX-50 2.5 Turbo Premium Plus
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Discussion Starter · #5 ·
Here are my numbers on running a full tank of 91 (Top Tier) in the turbo. For reference, I live in San Diego which is very hilly driving which is not what most people think. I drove 50/50 highway/city at average highway speeds 70-75, used i-stop, and drove somewhat conservative. No heavy accelerations from start and no need to floor it to get out of a dangerous situation (Obviously would have if needed). Basically didn't drive it like I stole it or an @sshole.

Miles drove at fillup = 339.7
Gallons filled to auto-shutoff (no top off) = 12.89
Average MPG = 26.35

I'm going to do this for three tanks to get a solid average.

On one of my going to work trips (25 miles one-way 90% highway), heading from the inland toward the ocean so mostly decreasing in altitude, I averaged 32 MPG.

It's not hard to reach or exceed the advertised MPG with the turbo or NA. You just have to be a conscious driver with your right foot.
Numbers on my second tank of 91 Octane in the turbo. Less highway driving on this tank and a little heavier right foot, which shows on the calculated average mpg. Still, not too shabby for the turbo engine.

Miles drove at fillup = 308.5
Gallons filled to auto-shutoff (no top off) = 12.95
Average MPG = 23.8

Of note, the car computer average mpg was off by one mile, showing 22.9
 

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2023 CX-50 2.5 Turbo Premium Plus
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Discussion Starter · #6 ·
Numbers on my third tank of 91 Octane in the turbo. This will be my final hand calc. post, as I now have a three tank average.

Miles drove at fillup = 305.7
Gallons filled to auto-shutoff (no top off) = 11.75
Average MPG = 26.0

Three tank average= 25.38

Car computer tank average was a full mpg short again
 

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Confirmed with dealer the first tank is premium(91)
1st fill up - 322.7km 52.3L
16.21L/100km - 14.51 MPG

2nd fill up - 299.4km 54.7L
18.27L/100km - 12.87 MPG

3nd fill up - 373.9 55.2L
14.76L/100km - 15.94MPG

Dash MPG number is higher than actual fuel consumption. About 0.5 ish L/100km higher.

Outside temperature is Low 20C high 27C

Condition: mixed city highway, max speed 120km/h, auto start stop on, AC always on, cooled seats for both front passenger on, window never opened. No load. Always 91 gas at Costco.
*more condition. Logged engine(driving hours) 42.3hours. Average speed is 23.77km/h. A lot of idling time. A lot of in town deliveries. My foot is fairly heavy. Very impressive. Get same mileage as my smaller GLA 45 AMG
 

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Hi all,
I got the CX50 Turbo - what a joy to ride. However the fuel averages are somewhat odd- I'm already 600miles in and on my third tank and I'm hovering around 20mpg all the time. Anyone see these numbers get a bit more friendly over time? Talked with the service dept at the dealer and they said they cant even test before 2,500miles because the computer is still calibrating...? Weird...
 

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Im happy with my 19 mpg because im moving a huge vehicle and not worrying about mashing the peddle(compared to my audi s3, tuned, city average 19, highway 24)
But im only at 400 miles so..and no long highway trips yet. Only use 91 too..
Really like this car👍
 

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Averaging 21 mpg on my last fill up I do mostly 60% city/ 40 %hwy non-turbo, I do get a mile or 2 better mpg with cruise control... I heard it takes between 1000-5000 miles for the break in period... compared to when I drove it off the lot I get 2 mpgs better on average from 500 miles to now 1500 on odometer. Hoping for improvements still I do live on top of a big hill in San Diego.
 

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Hi all, I got the CX50 Turbo - what a joy to ride. However the fuel averages are somewhat odd- I'm already 600miles in and on my third tank and I'm hovering around 20mpg all the time. Anyone see these numbers get a bit more friendly over time? Talked with the service dept at the dealer and they said they cant even test before 2,500miles because the computer is still calibrating...? Weird...
Exact same situation, 600mi on third tank, 93 octane on the last fillup and 91 the time before that. Granted, it’s colder now and I’ve been letting the engine run a minute or two before I get in and drive. Can’t get past 21MPG which is kinda disappointing, was hoping to get to around the numbers the others in this forum are getting.
 

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16.5 CX-5 Touring/2023 CX-50 Turbo Premium
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I am averaging about 15.6-15.8 MPG per fill up and this is with about 5,000 miles on the vehicle already. Most of my driving has been in the city with some occasional spurts of highway here and there (80% city/20% highway). With highway driving for long trips, getting up to 300 miles is no issue but it's pretty bad with the city driving especially during the winter as the car needs to be warmed up. What I've noticed with the EPA mileages is that it's not a 1-1 to comparison but it makes more sense to be conservative and subtract about 5-8 MPG from what the EPA claims if majority of the driving is in the city. This is my second Mazda so far and I recall that I was averaging about 19-20 MPG with my 2016 CX-5 Touring in the city even when I last drove it while the EPA claims that the MPG is about 26 (city) /35 (highway).

Here's a table of my MPG for both vehicles with a 80% (City)/20% (Highway) split.

YearModelTrimMileage (Miles)Gas Used (Octane)EPA MPG (55% City/45% Highway)Real World MPG Average
2023CX-50Turbo Premium5,0008723 City/29 Highway or 26 MPG Combined15.6-15.8 MPG Combined
2016CX-5Touring103,0008726 City/35 Highway or 25 MPG Combined19-19.5 MPG Combined
 

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Just to give some perspective on these numbers, I can share my experience with a 3.6R Outback, CX-50 TPP, and Lexus RX-350L. All three of these got similar mileage in my use, about 25 mpg (80/20 hwy/city split). The Outback and CX-50 both clock in at about 3900 lbs. The RX-350L is 4600 lbs, but also FWD. Both the Outback and Lexus have a V6 and the Outback has full-time AWD compared to the CX-50s FWD-based on demand system. The CX-50, in theory, should have better mpg than both of these cars, and in the case of the Lexus, significantly better. Also, only the CX-50 requires premium fuel to achieve the most power and best mileage. I attribute the poor mpg in the CX-50 almost entirely to the 6-speed. Until Mazda goes to a CVT (they will never, and good for them) or more gears, their cars will always be thirsty.

TL;DR: Don't get a CX-50 (or any Mazda for that matter) for fuel efficiency. It just isn't their goal.
 

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Just to give some perspective on these numbers, I can share my experience with a 3.6R Outback, CX-50 TPP, and Lexus RX-350L. All three of these got similar mileage in my use, about 25 mpg (80/20 hwy/city split). The Outback and CX-50 both clock in at about 3900 lbs. The RX-350L is 4600 lbs, but also FWD. Both the Outback and Lexus have a V6 and the Outback has full-time AWD compared to the CX-50s FWD-based on demand system. The CX-50, in theory, should have better mpg than both of these cars, and in the case of the Lexus, significantly better. Also, only the CX-50 requires premium fuel to achieve the most power and best mileage. I attribute the poor mpg in the CX-50 almost entirely to the 6-speed. Until Mazda goes to a CVT (they will never, and good for them) or more gears, their cars will always be thirsty.

TL;DR: Don't get a CX-50 (or any Mazda for that matter) for fuel efficiency. It just isn't their goal.
The six speed doesn’t help along with its lack of aero. We pay at the pump for its nice looking grill.
 

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I have a 2023 CX-50 2.5S Premium Plus. I purchased two and a half weeks ago. I took a trip from Louisville, KY to Dayton, Ohio.... 180 miles each way, set cruise between 70 - 80, used 87 octane and got 31.6 mpg for the trip. 36 psi in the tires.
 
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