Mile Per Gallon!!!!
- Thread starter sp535
- Start date
Well since weight is one of the few variables that is in the equation of gas mileage, chalk that one up as a illusion! Strip a CX-9 of the entire interior and other parts not effecting the driveline or aerodynamics, and I bet you can take 1000 pounds off the car and gain 5-10 mpg.
But that would be an expensive experiment.
Although weight effects inertia. Once your car is going the weight isn't much of a factor, so on long trips it tends not to matter as much as around town when you are stopping and starting a lot.
But that would be an expensive experiment.
Although weight effects inertia. Once your car is going the weight isn't much of a factor, so on long trips it tends not to matter as much as around town when you are stopping and starting a lot.
have 2010, AWD GT with only 800 miles..
If I drive it really nice, I usually see 18 mpg, in suburban driving.
Cruise control on the highway, at 62 MPH gets me a little over 22, according to the computer..(dance)
We have had hybrids in out house for the last 4 years, so I know how to get maximum MPG...
If I drive it really nice, I usually see 18 mpg, in suburban driving.
Cruise control on the highway, at 62 MPH gets me a little over 22, according to the computer..(dance)
We have had hybrids in out house for the last 4 years, so I know how to get maximum MPG...
nazgul350r
Member
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- 03 MSP & 08 CX-9 GT
08 GT FWD on the interstate 70-80mph we recently got 25mpg. Lots of drafting 
OK group, this may have been discussed before, but how do my larger tires affect the overall mpg? I have the 20's and the ride I get on the road is great. Just returned from a 1,000 mile roadtrip around Arizona and the best I got was 19.5 according to the onboard computer. Someone clue me in! Or.....does the factory "adjust" the onboard computer according to the vehicles tire size when it comes to computing all of the "INFO" data it displays? On this recent roadtrip we were on two lane roads most of the way with some freeway driving as well. I would say that about 75% was on the two ways with some hills. I always downshift when going uphill inorder to keep the revs up. No sense in "lugging" uphill and creating too much heat in the ATF! Also use the manual mode for helping to break the engine when going downhill. Saves on brakes as well. This trip was a speed limits posted. Arizona,like the rest of the nation is cash poor and writing tickets is an easy way for a state, city to up their revenue. So all of you out there traveling the highways and byways of America.......watch out for Smokey!
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- 2022 CX-5 Turbo
How fast were you going on average?
I could easily get 22mpg from San Jose To Sacramento (120 miles) maintaining 70-75 all the ways.
To get good highway mileage:
(1) check tire pressure (34psi recommended)
(2) maintain speed (whatever makes you happy)
(3) check air filter (make sure it is not dirty)
I could easily get 22mpg from San Jose To Sacramento (120 miles) maintaining 70-75 all the ways.
To get good highway mileage:
(1) check tire pressure (34psi recommended)
(2) maintain speed (whatever makes you happy)
(3) check air filter (make sure it is not dirty)
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What ceric said ^^^
20" wheels have nothing to do with MPG if that is the size the vehicle came with from factory. As long as you maintain the same diameter of wheel/tire combo your "MPG" will not suffer. In reality MPG does not suffer going to bigger wheels, what happens is that most people go so big (wheel/tire combo) that they change the overall diameter of their wheels and the speedometer does not read correctly. Thus, giving you a read out of less miles traveled per tank rendering a lower incorrect MPG.
For example, if you traveled 18 miles to work one way on your stock wheels you would waist 1 gallon of fuel (hypothetically speaking)
Now lets say you upgraded wheels and tires and now your overall diameter is about 1" more then stock set up. The wheel is now going to rotate less times in those same 18 miles then your stock wheels. Meaning that your speedometer is going to read that you traveled less miles because it is calibrated to measure a specified amount of rotations of the wheel per mile traveled on the stock set up. So lets just say that your read out now says that you traveled 17 miles to work, you just automatically decreased your MPG by 1 mile getting the wrong read out.
20" wheels have nothing to do with MPG if that is the size the vehicle came with from factory. As long as you maintain the same diameter of wheel/tire combo your "MPG" will not suffer. In reality MPG does not suffer going to bigger wheels, what happens is that most people go so big (wheel/tire combo) that they change the overall diameter of their wheels and the speedometer does not read correctly. Thus, giving you a read out of less miles traveled per tank rendering a lower incorrect MPG.
For example, if you traveled 18 miles to work one way on your stock wheels you would waist 1 gallon of fuel (hypothetically speaking)
Now lets say you upgraded wheels and tires and now your overall diameter is about 1" more then stock set up. The wheel is now going to rotate less times in those same 18 miles then your stock wheels. Meaning that your speedometer is going to read that you traveled less miles because it is calibrated to measure a specified amount of rotations of the wheel per mile traveled on the stock set up. So lets just say that your read out now says that you traveled 17 miles to work, you just automatically decreased your MPG by 1 mile getting the wrong read out.
CX9SportAlvin
Member
34PSI? Doesn't the side door say 36PSI? Again, this is on a 2010 CX-9 Sport AWD. Am I missing something?
Mpg
Thanks to all for their input. My speed through Arizona was within local limits do to the simple fact that, like most other states, Arizona is in need of operating funds for their state needs. They really are sticklers for the posted limits and stop you even if over a couple of MPH's. I only know this because had been warned by some locals to watch my speed!
Arizona's freeway limit is 75 MPH! Of course that is what I drove at when applicable, so my mpg's obviouly were affected during those periods. I drove from Las Vegas to "The Real O.C." last week with a pretty high head wind but I kept my speed down to no more the 70 mph and I got 20 MPG. Still not what I expected but better than when my foot was in it!
Thanks to all for their input. My speed through Arizona was within local limits do to the simple fact that, like most other states, Arizona is in need of operating funds for their state needs. They really are sticklers for the posted limits and stop you even if over a couple of MPH's. I only know this because had been warned by some locals to watch my speed!
Arizona's freeway limit is 75 MPH! Of course that is what I drove at when applicable, so my mpg's obviouly were affected during those periods. I drove from Las Vegas to "The Real O.C." last week with a pretty high head wind but I kept my speed down to no more the 70 mph and I got 20 MPG. Still not what I expected but better than when my foot was in it!
CX9 SportOwner
Member
Latest trip, with my wife going alone. 400 miles through northern Arizona, 5100', through 7100', to 5600' feet, then back again. 23.6mpg best so far.
Wisconsin Proud
Member
I see your problem: driving 75mph and the downshifting for hills will kill your mpg.
If you drop down to 70mph you will see a noticeable difference. Remember, fuel mileage decreases exponentially as speeds get higher due to the wind resistance. It might seem like 5 mph should have minimal effect but there is a huge resistance difference between 65, 70 and 75mph.
I also have a 2009 Chev Malibu with instant mpg readout. On a flat surface at 70 mph it will get 36mpg easily. Bump it uup to 75mph and I'll get 33mpg.
If I "draft" behind a semi truck, I could get well over 40mpg due to the huge difference in wind resistance.
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- 2022 CX-5 Turbo
Wind resistance is proportional to the square of velocity.
i.e. 5% increase in speed will consume more than 10% of fuel.
At highway speed, wind resistance is the major factor of MPG. CX9 has Cd=0.36, which is top-notch for a CUV. Pump up your tire pressure to near 40psi if you can live with that harshness.
i.e. 5% increase in speed will consume more than 10% of fuel.
At highway speed, wind resistance is the major factor of MPG. CX9 has Cd=0.36, which is top-notch for a CUV. Pump up your tire pressure to near 40psi if you can live with that harshness.
Wisconsin Proud
Member
Within an hour at 80 degrees air temp your tires will be at 45psi.
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- 2022 CX-5 Turbo
Not that I would be an advocate about it, but the MAX PSI on the tires is way under-rated.
Many Prius owners run their tires are 44 psi (cold) to save fuel (crazy) and get even wear on LRR tires. No problem. Insiders in tire industry will tell you that tires can hold up to more than 50psi safely.
Again, make your own educated decision.
I run my tires at 34psi.
Many Prius owners run their tires are 44 psi (cold) to save fuel (crazy) and get even wear on LRR tires. No problem. Insiders in tire industry will tell you that tires can hold up to more than 50psi safely.
Again, make your own educated decision.
I run my tires at 34psi.
Thats pretty much normal for everyday combined city/highway MPG for our CX-9. I'm happy with it!!