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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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#89 of 140 Re: trained on a hybrid [dorenescar] by ceric Apr 18, 2008 (1:32 pm)
Replying to: dorenescar (Apr 18, 2008 10:37 am) I agree. We have a Prius, and now a CX-9 AWD. I know the "pulse & glide" routine very well. As you said, the trick is a brisk (not too fast, not too slow) acceleration to your target speed, then maintain the constant speed. Timing red lights is also crucial.
#90 of 140 Mazda CX-9 Touring FWD by 18mike Apr 19, 2008 (5:41 pm)
I put on mostly highway miles and drive 65-70 MPH. Is it reasonable to assume I will get 20MPG on the highway ?
#91 of 140 2008 GT FWD MPG by btm2518 Apr 20, 2008 (12:09 pm)
Two months old with a total of 2,300 miles.   60% Suburban, 40% Hwy - 17.0 mpg   95% Hwy (2 lane road), 5% City - 19.7 mpg Replies to this message: ezye (Jul 01, 2008 12:03 pm) nxs138 (Jul 03, 2008 8:03 pm)
#92 of 140 Real World MPG CX-9 GT AWD by skc7 May 01, 2008 (5:51 am)
I have 3500+ miles on my 2008 CX-9 GT AWD and I'm getting about 15-16 mpg in all city (stop & go) driving and 20-23 mpg in all highway driving. This is pretty much the EPA estimates and while I would like better city mileage, I cannot really complain. I'll report again later after about 5-10K miles if there is any change.
#93 of 140 Better than Average Mileage. by blueru May 09, 2008 (10:09 am)
We have owned our 2008 CX-9 since March 4th and we love it. We bought a base model (FWD Sport?) with the moonroof & power seat option. Within 2 weeks of owning it, we drove it to Hilton Head, SC (900+ miles one way) and were able to average between 23 - 24 MPG going about 72 MPH the entire way! Since then (now have about 4000 miles), we have been averaging about 18 - 19 MPG in mostly city (85%) driving. Several of you have mentioned pulse and glide....that is how we do it in town/city. This car glides forever....I have been able to easily glide more than a 1/4 mile and only lose 5 - 10 MPH The vehicle is great and I would recommend it to friends and family. Replies to this message: ceric (May 09, 2008 10:46 am)
#94 of 140 Re: Better than Average Mileage. [blueru] by ceric May 09, 2008 (10:46 am)
Replying to: blueru (May 09, 2008 10:09 am) I also found that CX-9 glides much longer than others. I suspect that the flywheel is quite massive, which hurts the acceleration a bit. (a heavy flywheel smooths out acceleration and deceleration) People with AWD is not as lucky in term of MPG. I believe a 2mpg difference is more realistic than EPA's 1mpg. Pulse and Glide works extremely well for hybrids, but the same applies for ICE vehicles as well, only not as much improvement. For ICE vehicles, just try to keep RPM low. Modern vehicles try to maintain same fuel/air mixture (within 5% range). Therefore, RPM is a good indicator of fuel consumption. CX-9 has very short 1st gear (1st=4.15). I have tried to start at 2nd gear (with M+/-) and it pulls fine. I can see the 1st gear will be useful on heavy load. The transmission program should allow CX-9 to start at 2nd gear. It has the torque (270ft-lb) and gear ratio (2nd=2.37) to do that. Most BMW auto-tranny automatically starts at 2nd gear when not accelerating hard offline. In contrast, the 1st gear of Honda Pilot 5-spd tranny is 2.422 (FWD), very close to CX-9's 2nd gear. While most 6-spd tranny save fuel, but not the one on CX-9 since the extra gear is placed very short to have the "zoom-zoom" feel offline. Compare the 6-spd gear ratios and those of Honda Pilot's 5-spd, and you will see what I mean.
#95 of 140 Crossovers MPG by seloo May 10, 2008 (3:56 pm)
The MPG for these cars is very disappointing. Most minivans get as good or better MPG than the major crossovers. These crossovers have good platforms, they just need to get 22 City and 30 Hwy MPG.   Maybe they can rework the gear ratios in future models. Ceric is correct most BMWs (6 cyl) balance performance with fair to good MPG.
#96 of 140 Re: The problem with the MPG by hot4amy May 12, 2008 (7:52 am)
Replying to: ceric (Feb 13, 2008 9:35 am) Hmmm I have had 3 CX-9 during the last 3 months....original AWD GT stuck in repair after 2 weeks; loaner CX-9 (FWD) for 1 month; replacment AWD GT for 6 weeks. Have yet to get any better than 14.8 mpg combined(50/50) Try to turn off climate control, never go over 65, check tire psi, ..........   amazing getting same mpg than Suburban..... no....not speeding nor lead footed.   Wish wife had chose the Toyota or Honda or even the Acadia ....since repair had been horrible for a new vehicle. Replies to this message: ceric (May 12, 2008 9:12 am) vinsuz (May 13, 2008 9:11 am)
#97 of 140 Re: The problem with the MPG [hot4amy] by ceric May 12, 2008 (9:12 am)
Replying to: hot4amy (May 12, 2008 7:52 am) I think Toyota/Honda would probably have given you better MPG, but not the Arcadia. Go read their forums. You will see that Arcadia's 500lb extra weight is something to carry around. All I can say is that go gentle on the 1st gear, and your CX-9 MPG will be fine. I have been averaging 16+mpg in SF BayArea traffic. Zero problems after 5000 miles.
#98 of 140 Re: The problem with the MPG [hot4amy] by vinsuz May 13, 2008 (9:11 am)
Replying to: hot4amy (May 12, 2008 7:52 am) What's the terrain where you live? I live in Western Pa with a lot of hills, but now that I've surpassed 2k miles, my '08 GT is getting 16+ consistently (50/50), and I'm sort of a lead foot and drive 70+ mph on the interstates. I don't know the validity of the supposed "break-in period", but I have noticed a slight improvement.

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