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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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#86 of 140 Re: very pleased with mileage [ceric] by maltb Apr 15, 2008 (3:50 pm)
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. Replies to this message: jchan66 (Apr 15, 2008 5:01 pm)
#87 of 140 Re: very pleased with mileage [maltb] by jchan66 Apr 15, 2008 (5:01 pm)
Replying to: maltb (Apr 15, 2008 3:50 pm) I have a 08 Touring AWD with towing package. I live in Portland, Oregon with a lot of hills. My first 1300 miles got me an average of 15.4 mpg so far with 50/50. The best I got so far was 17.8 mpg with 90% of highway for once.
#88 of 140 trained on a hybrid by dorenescar Apr 18, 2008 (10:37 am)
it appears we are getting higher mileage than some on our FWD CX9; we also have a lexus 400 H, which has trained us, by visual instant calculation, on how best to drive that vehicle. Some posts on another thread talked about getting an aftermarket small mileage indicator for CX9 - I don't know if there are any that calibrate the instant mileage, but if so, it can help hugely. We've gone up 3mpg in the hybrid; the key is minimally and slowly gassing it after a stop, and taking foot off pedal and coasting as much as possible. My husband is even better than me; he can go on and off pedal continuously, and gets 29 mpg on the hybrid. I hope to get 20 mpg on this Mazda vehicle. I used to get a lot of speeding tickets; this type of driving is ticket free! Replies to this message: ceric (Apr 18, 2008 1:32 pm)
#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.

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