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Mazda CX-9 Real World MPG

140 messages,  Last post on Feb 13, 2009 at 11:14 AM

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What is this discussion about? Mazda CX-9, SUV


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#77 of 140
Re: any hope for new diesel or a hybrid [jreddick] by boobot
Mar 13, 2008 (9:51 am)
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Replying to: jreddick (Mar 09, 2008 12:39 pm)

Diesels are looking less and less attractive. Granted they get better fuel mileage but the price of diesel is skyrocketing. In Houston, as of 3/13/08 we pay $3.10 for unleaded and diesel is $3.89. As you can see the main advantage (I know there are others) of diesel's fuel economy is shot down by the high prices. There are many reasons why diesel is high and will remain high. It stems from excess demand in Europe, AsiaPac and now even the U.S.
 
It is also now more expensive to refine since it is cleaner. Even Katrina has an effect on diesel since many plants were shutdown when they came back on line they focused on producing standard petroleum. Couple low stocks with high demand for diesel and you have the ludicrous prices we see! I wish it wasn't that way because I would go for a diesel CX-9 in a heartbeat!
#78 of 140
Re: any hope for new diesel or a hybrid [jreddick] by skw0123
Mar 15, 2008 (2:02 pm)
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Replying to: jreddick (Mar 09, 2008 12:39 pm)

Well, if you drive 60 or 65 on the highway (tops) you might get it in the CX-9. The one fault in almost everybody's assumption about highway mileage is that you can get 22 (or 21 AWD) if you drive at 75 MPH. This 10-15 MPH difference easily accounts for a 15-20 percent drop in highway mileage vs. the EPA.
 
15 percent drop from 22 MPG = 18.7 MPG
20 percent drop from 22 MPG = 17.6 MPG
 
Driving habits probably account for the rest.
 
So let's say somebody reports getting 15 MPG mixed mileage for a trip that is 60 highway/40 city. This is on par for city mileage, but it probably means that a heavy foot in town and an average highway speed of 75-80 MPH could easily account for the rest.
 
Wet roads make a big difference since the wide tires have so much contact area, and driving in windy conditions or hilly terrain are obviously factors too.
#79 of 140
Re: any hope for new diesel or a hybrid [skw0123] by c_rex
Mar 15, 2008 (10:48 pm)
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Replying to: skw0123 (Mar 15, 2008 2:02 pm)

curious about this part
"Wet roads make a big difference since the wide tires have so much contact area, "
 
I live in a rainy neck of the woods and am wondering if I should go for 18"s if I buy a CX-9.
 
TIA
#80 of 140
Re: any hope for new diesel or a hybrid [c_rex] by ceric
Mar 15, 2008 (11:50 pm)
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Replying to: c_rex (Mar 15, 2008 10:48 pm)

On CX-9, 18" and 20" tires have the same width at 245mm = 24.5cm.
20" wheel/tire combo is heavier than the 18" wheel/tire combo. That will cost you a bit of MPG (but way less than 1mpg)
 
EPA testing of mighway mileage varies speeds around 48mph (2007 and before). If one holds constant speed (say using cruise control), one can definite beat EPA highway mileage even at 65mph. I don't know about the new 2008 rating system since it has been updated.
#81 of 140
Re: any hope for new diesel or a hybrid [ceric] by c_rex
Mar 16, 2008 (12:27 am)
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Replying to: ceric (Mar 15, 2008 11:50 pm)

right on. thx ceric!
#82 of 140
very pleased with mileage by dorenescar
Apr 14, 2008 (10:11 pm)
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Our new CX 9 FWD; first tank averaged 18.9, mostly city miles. This is above the prediction by EPA, which was 18 combined. For a large SUV, over 5,000 pounds, we're very happy with our first tank results. I love this vehicle in all ways!!
#83 of 140
Re: very pleased with mileage [dorenescar] by ceric
Apr 14, 2008 (11:02 pm)
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Replying to: dorenescar (Apr 14, 2008 10:11 pm)

People with AWD are not that lucky.
I have been getting 16.5 - 17.5mpg with mixed driving.
And, I am not lead-footed, just following the flow.
AWD is 5% heavier (200lb+) and more powertrain loss. -2mpg is expected.
 
BTW, CX-9 FWD is only 4350lb (curb weight - meaning all fluid/fuel - no person).
AWD is about 4550lb + extra accessories.. (hitch-30lb, roofrack-15lb, .....)
#84 of 140
Re: very pleased with mileage [ceric] by maltb
Apr 15, 2008 (10:27 am)
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Replying to: ceric (Apr 14, 2008 11:02 pm)

EPA ratings are 16/22 and 15/21 for FWD and AWD, respectively.
#85 of 140
Re: very pleased with mileage [maltb] by ceric
Apr 15, 2008 (2:37 pm)
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Replying to: maltb (Apr 15, 2008 10:27 am)

Yes, I know.
I have a gut feeling that the difference in MPGs between FWD and AWD is more than 1 mpg. We should do a poll on this. My guess was 2mpg.
#86 of 140
Re: very pleased with mileage [ceric] by maltb
Apr 15, 2008 (3:50 pm)
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Replying to: ceric (Apr 15, 2008 2:37 pm)

I may find out in a few months...if I get an AWD.
 
My current FWD averages about 17mpg with 50/50, but I tend to drive a little fast on the highway making the 22mpg figure unreachable. With any car, I typically average the city rating.

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