New CX9 GT owner concern about gas mileage

Vartan

Member
Hello every body. CX9 GT is really a good crossover. I used to have a Honda Pilot. Big difference. But the gas mileage for mainly city drive is 14 to 15 mpg. Kind of low comparing to the specification posted on the Mazda website. Does anybody has the same problem?
 
Hi, is it an AWD, or front-wheel drive?
It seems a little low, but not by much, for mainly city driving and depending on your driving style.
Remember that CX-9's are not exactly at the top of their class in gas mileage to start with and the posted mpg is pretty much an ideal that the average driver will never achieve consistently.
 
Hello every body. CX9 GT is really a good crossover. I used to have a Honda Pilot. Big difference. But the gas mileage for mainly city drive is 14 to 15 mpg. Kind of low comparing to the specification posted on the Mazda website. Does anybody has the same problem?

only have one point of reference to offer you after filling her up a few days ago - averaged ~16.5mpg or so. will continue to post future mpgs when i get through another tank of gas.
 
16.5mpg for AWD on mixed driving is about right for me as well.
On long stretch of highway at 75mph I can get 21-22mpg.
 
You'll see people all over the board, but I only get about 14 or so. I have averaged about 20 on the freeway.
 
The MPG difference between FWD and AWD is actually larger than that of EPA rating.
(EPA says 1mpg, however, it is more like 2mpg)
Especially so in city driving where weight difference plays a major role.
On highway, tire friction and wind resistance dominate.
 
gas mileage is MUCH more dependent on the driver then any tires you use or what gas you use. I can guarantee my wife gets better mileage on the 9 then I would/do. I am a spirited driver and she just chugs along. She can easily meet or beat the sticker mpg rating and can easily be under it.

what type if terrain are you driving on as well, flat, hilly, tons of stop and goes, at least 4-5 miles between stops?

MPG is based on too many variables for everyone to get the same or better or even worse mileage then the sticker shows. I say if you are on 1-2mpg of what the vehicle is rated at? Excellent if it is above the rating and if below, drive a little easier.
 
Don't underestimate the impact of tires (not PSI) on MPG.
Some tires are labelled as LRR "Low Rolling Resistance".
This is no hype. It is well-know in Prius community (who are very MPG savvy).
Anyway, LRR index is rarely published. You have to look it up.
The Prius comes with LRR tires, which suck in handling, wear and noise, but it is the king of MPG. Any tires you change after the OE, you will see MPG drop for at least 5 mpg (baseline is 45-50mpg). That is about 10% drop from the best LRR tires.
Mostly, LRR impacts rolling and highway travelling as the name suggests.

Pumping up PSI to 40 and find a LRR tire if you really really care about MPG.
True, how you drive affects the MPG the most. Other factor such as tires, and PSI come in second.

For the OP, don't forget that your Pilot was running 225 tires with at least 200lbs lighter and smaller.
Not to mention a smaller engine 3.5L vs 3.7L (much less horsepower and torque).
For AWD, Pilot's VTM-4 does not engage (shaft is not spinning) until slip is detected.
That saves some fuel also.
 
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OP might have the 07 3.5 Ford engine. That drinks premium as well (boom05).

I would suggest those experiencing low gas mileage, try driving it w/o a lead foot. It'll help more than any other suggestions, unless of course like another poster said you live in Arizona.
 
hamproof, I keep seeing you mention the premium fuel requirement in the 07. We have one and our owners manual say 87 octane is recommended. And, last time I checked, that's not premium fuel.
 
Looks like I've gotten incorrect info on the 2007 model. I can't find the article now, but when I was researching the differences bet. the 2007 and 2008, the main highlights on the engine differences were the 3.5l is a Ford engine and Mazda had the 3.7l exclusively and also 3.5l takes premium and 3.7l takes regular.

I don't seem to be able to locate that article using google now and the closest I could find is this posted by a forum member. Maybe someone who has an old CR magazine can confirm? Either way the info is wrong.

http://townhall-talk.edmunds.com/direct/view/.f0f04fe

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In the new Consumer Reports 2007 Car magazine it lists the upcoming CX-9 as using premium gas. I was under the impression that the Ford-sourced engine will use RUG. Any firm information...not conjecture, please! Is this an error on CR's part?
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Sorry for the mis-information.
 
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2007 takes regular gas not premium


Looks like I've gotten incorrect info on the 2007 model. I can't find the article now, but when I was researching the differences bet. the 2007 and 2008, the main highlights on the engine differences were the 3.5l is a Ford engine and Mazda had the 3.7l exclusively and also 3.5l takes premium and 3.7l takes regular.

I don't seem to be able to locate that article using google now and the closest I could find is this posted by a forum member. Maybe someone who has an old CR magazine can confirm? Either way the info is wrong.

http://townhall-talk.edmunds.com/direct/view/.f0f04fe

*******************************************
In the new Consumer Reports 2007 Car magazine it lists the upcoming CX-9 as using premium gas. I was under the impression that the Ford-sourced engine will use RUG. Any firm information...not conjecture, please! Is this an error on CR's part?
*******************************************

Sorry for the mis-information.
 
The 3.7 is Mazda only. All 2010 Ford and Lincolns are using the 3.5 Duratec.

The-9,
That was not completely correct.
See wikipedia for reference.
http://en.wikipedia.org/wiki/Ford_Cyclone_engine

MZI 3.7 (=Duratec 37) has been used in 2009 Lincoln MKZ and will be used in 2010 MKT. Mazda enlarged the bore from 92.5mm to 95.5mm and revised the intake and programming for the enlargement. Later on, Ford adapted the new Duratec 37 into Lincoln. Basically, Ford->Mazda->Ford.
Since Ford not longer own (legally) Mazda (now 13% owned by Ford), no one can predict what will happen to this engine from Mazda's perspective. Will the next-gen CX9 continue to use Duratec? Will CX9 use the next-gen Duratec that will incorporates DI (potentially 300+hp and uptp 10% better MPG)?

With ScanGauageII on my dash, I feel that the this engine needs lean burn (if it does not now) at idle. At red lights, I can see my MPG drops very quickly (e.g. drop 0.1mpg every 5-10 seconds of idling). This would severely impact the MPG for city driving. I know Honda incorporated lean burn in their 4-bangers. Maybe someone who knows can chime in here.
 
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