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Mazda CX-9 Real World MPG



  • Does anyone know why the 2011 is rated 2 miles per gallon better. Everything I have read says the 2010 and the 2011 are the same. I cant figure out how it is getting better mileage. Mazda lists the 2010 as 16 city and 22 hwy and the 2011 ,..17 city and 24 hwy. Anybody know whats going on ?
  • circlewcirclew Posts: 8,353
    Engine components tweaked and computer chip reprogram...not too much but 10% gain in efficiency.

    Makes you wonder why it wasn't done to the 2010...

  • I wonder if it would be possible for the dealer to load the 2011 chip program on a 2010. I just bought a 2010 CX-9 GT this weekend. My wife will use it to commute 90 miles/day so every mpg counts!
  • circlewcirclew Posts: 8,353
    Probably not. Here's an update. Stick with stock and check tire pressure each month.

    Just did the same! CX-9 GTAWD/MRB/RLG) for her!

    Mazda says fuel saving improvements were a outcome of work done on a model’s AWD differential rigging carryout, engine optimisation for improved explosion control (during deceleration as well as at resting as well as reduction in delivery attrition.

    Depending upon various, new 18 as well as 20 in. amalgamate wheels will set a 2011 Mazda CX-9 detached. The brand new alloys are lighter than prior to as well as come wrapped in tyres that suggest improved rolling insurgency (better fuel saving.

  • MY 2010 CX9 GT FWD after 2 weeks is ONLY GETTING 13.3 according to its computer, how accurate are these; my wife is freaking out; her BMW 530 got at least 16 in the city...these are not even close to the posted sticker values; wonder if anyone ever sued a car company over missing the mark; DO NOT LAUGH, Mazda got sued and lost years ago when the MPH on the RX8 did not come closeto what was advertised; my neighbor was in on the class action suit,; the service writer says some get better as the car breaks in, some get worse? :sick: dogdoc
  • cericceric Posts: 1,093
    edited January 2011
    Short drives give you 13mpg.
    That is perfectly normal if you know how EPA do the tests.
    My wife's Prius gets 33mpg all the time on school routes, which is about 2 miles away with several stop signs and lights.

    Take the CX9 on a long trip, you will get 22 mpg AT LEAST!
  • I have had my Mazda CX9 AWD for more than two years now. I haven't reset the onboard computer for about 75-80K km. According to the computer, my average is 13.2l/100 km (21.4 MPG).
  • robr2robr2 BostonPosts: 7,735
    Engines take some time to break in. Don't be suprised that it may take up to 10K miles before peak mpg is achieved. Further, actual mileage is affected by length of trip, weather, engine temp, amount of alcohol in the gas, et al.

    Further, if you have complaints - point them at the EPA. Mazda did not come up with the numbers, the EPA did.
  • This is not true. I have a brand new cx9 2011 sport and MPG is terrible. I'm finishing a chart right now (I will post in minutes new info) but I'm really dissapointed with the MPG advertised and real results.
  • On City with no traffic at all (at 02:00am) I made 17.5MPG (driving 23km= 14.3 miles)

    Today morning with heavy heavy heavy traffic I made 8.9 MPG!!! (26.4 L/100Km - 3.78 Km/L). This last values are horrible numbers.

    In the next weeks I will have a highway driving (310 miles) so I will check the MPG consumption in highway.

    Some weird stuff I see on the new CX9 2011 is I can go at 40miles x hour and the gearbox is in 6th gear. I read in the past 6th gear is only at highway but seems the new cx9 have a new programming (stupid) because MPG is horrible.
  • robr2robr2 BostonPosts: 7,735
    Give it some time to break in. Most engines don't reach peak MPG until about 10K miles.

    Also, it's cold, you were sitting in traffic, et al - you can't expect to great MPG. To give you an idea, my VW Passat (rated at 25 city) was returning today about 18 MPG due to heavy traffic.
  • kyfdxkyfdx Posts: 27,623
    edited February 2011
    Trying to figure your gas mileage daily is an exercise in frustration, and not likely to result in accurate numbers, anyway...

    Fill up your car.. reset the trip odometer... Next time you fill up, note the number of gallons, and divide that into the mileage on the trip odometer... that is your fuel mileage...

    Do it at least three or four consecutive times...

    Then... report back here!

    Prices Paid, Lease Questions, SUVs

  • cericceric Posts: 1,093
    CX9s are heavy vehicles.
    I don't know what people expect the MPG should be for a 4500lbs vehicle in stop and go traffic. All the energy has to come from somewhere. CX9 is not hybrid. No energy is recovered from braking.

    There are many factors to MPG. Compared to a vehicle like Pilot. Then, we are talking.

    CX9s are very efficient on highway speed due to low 6th gear ratio and low Cd (0.36).

    BTW, CX9 switches to 6th gear at 42mph at light throttle.
  • Thanks. The exercise you instruct to know the fuel mileage is very good, I will do it, but now in the first days of the SUV, I need to know values of consumption in different enviroments: city normal, city heavy traffic, city super heavy (i.e: 30 minutes for 6 miles!), highway and city/highway conbination. This is very important to adopt driving habits and understand factors affecting fuel economy. For example here in mexico there is lot of speed bump and this stop - and go maneuvers are real bad for this SUV. In my old accord v6 2005 and old volvo turbo 2007 this was not a problem at all but with this heavy SUV, is a real headache.

    I will get back with real numbers but I'm telling you this SUV is making consuption numbers like a Hummer V8
  • CX9 weights 600lbs more than CX7, is a heavy SUV, but the V6 is getting gas consumption in V8 numbers. Believe me, in my job a friend have a Jeep V8 and is getting better numbers.

    One thing concerns me: at 40miles x hour the gearbox use 5th gear and at 50mph the gearbox changes to 6th gear. I believe this is new in 2011 because in internet articles I read 6th is only for highway cruise but not in this model (or is a factory defect)
  • Are most of you posting the low mileage referencing the MPG on the dash "info" panel? That says I am getting 13.2, I want to do the simple tripmeter and the number of gallons at fill up and see if it gets any different numbers.... :surprise:
  • cericceric Posts: 1,093
    5th to 6th happens at 42mph at light throttle.
  • I´m getting better numbers now after some "practice" with the CX9. in full highway I get 23.9 MPG. This is the expected number I think.
  • Could you tell me what you did to improve the MPG? Have you noticed any improvements in city driving MPG as opposed to before?

    I just got a new CX-9 2011 and drove it only for ~100 miles but it seems to have horrible consumption. The average stayed at 10MPG, and once as I drove into the city it even went to as low as 7.8MPG !!!

    I am thinking there must be something defective with the car, as this is a far reach from the minimum 16MPG that it's supposed to get ...

    Thank you!
  • vic nyc

    Could use more information. How many miles on your CX-9, FWD or AWD, what type of driving, how are you determining mpg.

    Also the EPA rated mpg of 16 is not a minimum and not a guarantee. It's just a measurement of the fuel consumption during an EPA city test.
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