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Infiniti M35/M45 Real World MPG
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Comments
EmGee
That and ULEV.
And when you want the max performance you can manually select lower gears.
Prior car was a 2003 M45 and I got 20 mpg. Not unhappy but I did think my gas mileage would go up with the new one.
On another subject, the M45 was terrifying in the snow and M35x is a beast. Very happy.
Are there any M45 owners (prefer over 1 year old, so it shows broke in gas mileage) that can share their gas mileage as well as the driving style and city/highway %.
I have a M45 and it seems that I basically get same city or highway, which is around 20 (say 18.5 city and 20.3 highway). Is this normal?
I am used to the bad mileage already, but just feel it odd that I get almost the same gas mileage on city and highway - well a little over 1.5 MPG difference. This is not normal to me, thus the post/question.
Anyone mind share their experiences/thoughts?
Even for break in period, with AWD, 10MPG seems low. Unless it is very congested city and you have a lead foot and somewhat short trip (less than 10 miles each way). I get 15 when driving very aggressive in heavy city traffic and get 18 when take it easy.
Infiniti could build a more efficient engine, but I think fuel economy is simply not their focus point.
What did you do to get to around 26? I need to know in case the gas price goes to $4/gallon again
Keep in mind, the M is very thirsty to begin with.
I have a 2006 M35x and my average tank mileage is about 20-21mpg, but I travel 19-miles, mostly highway each way to work. My mileage went up a little (maybe around 1mpg) when I switched to synthetic oil. I've had the oil tested periodically, and can safely run about 10k miles between oil and filter changes. You probably wouldn't want to do that with all of those short trips.
In NYC you might get run over by the cabbies if you don't accellerate fairly quickly, but it can make a huge difference if you take it a little easier, and don't brake late when you see the light is red ahead of you.
I'm seriously considering a new Mercedes E-class diesel. It should be great in short trips and on the highway (rated at 32mpg highway).
So, with your short trip and a lot of stop light, 10-13 MPG is not a surprise. I have a M45 and if I reset the trip computer at start up and drive the first 2 miles (45 MPH zone with basically no light), my MPG reading would be somewhere around 13, but since my commute is 22 miles one way, I normally get 17-18 without A/C and 15-17 with A/C.
So, short trip makes the car running at inefficient zone all the time - so it is not a surprise for your MPG. If you are driving a small I-4, this is not that noticeable, but for a big 6 (or 8), it is a very significant factor. Next time, reset your MPG calculation before hit a highway and run at least 15 miles and see what MPG you get. I will be surprised if it is not over 20.
What;s more important is: make sure you run the car for at least 15 miles one way once a month (or more often) with a few good accelerations. This will clear up all the carbon build up in the engine caused by all those short trips.
That is correct. But, with your driving style, I would change oil more frequently, since short trips are hard on the engine. So, with regular oil, I would do it every 3000 miles and with Mobile 1, you can extend it to about 7500 miles, but, still, I would NOT go way pass 6 month (7-8 month might be OK) though.
Yes, inflate the tire to 34 PSI will provide improved MPG - with some sacrifice of riding quality, not by much though.
Speed limits vary from 55 to 70 with probably 70% of the trip at 70mph.
So, overall MPG for this trip, with an average speed of about 75MPH, turned out to be 23.8 MPG on premium. And I blew the doors off an Audi A6 and a GS350. Probably dropped my average by 1!
I got so fet up that I switched to Shell 93 Octane, after several family members and friends recommended it and after about 4-5 fillups with Shell I noticed a dramatic improvement in all mpg categories, city, highway, avg, etc!
Just a suggestion to help clean out your engines and get better fuel economy; if you don't have a Shell near you try using turkey hill or one of the other top tier gasoline companies!!
One problem is that octane ratings aren't all equal....some measure a the bulk tank, some measure at the pump some probably measure in the lab. I always have this lingering concern because all the gas you see in those huge bulk tanks is regular and the higher octane is created by adding additives at the bulk plant or at the truck. Those additives cost money and they require a human to so something to add the additive. There is a cost incentive to maybe miss adding anything. I know, it's paranoia....but there really is no way to know what you a putting in your tank. Now when you use an off-brand, you are really taking your car's life into your own hands...because those stations have chosen to make more money by offering an off-brand....so maybe saving a little more is even better.
Darn...where is my shrink when I need him?