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Sedans Infiniti M35/M45 Infiniti M35/M45 Real World MPG
91 messages, Last post on Nov 27, 2009 at 4:41 AM
You are in the Infiniti M35/M45 Forum. Your Hosts are pat & karens
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| Bought M35 non-sport in January 2006. Great car! Learned to manage my foot on the accelerator, it's a habit now, although somewhat disconcerting when I have to drive a rental car during an out of town business trip. Use premium gas. Get right at 18 mpg, with 50% city street driving. The other 50% is what I call metro-area hwy driving - meaning hop up on to an interstate, and drive 10-20 miles to get to another part of town. Have not done any true long distance hwy driving... i.e. hundreds of miles on a single trip. | |
| I commute 28 miles one-way with about 20 being on the freeway. After 16 months the computer reads my overall average is 20.2 I always use premium fuel. | |
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I have found that mileage is better if you use the manual shift mode. The D (automatic setting) always keeps the gear in position for maximum performance. For the best mileage, it is best to keep the car in 4th or 5th gear. Manual mode lets you select higher gears at the expense of acceleration (though it is still plenty of power for everyday driving). And when you want the max performance you can manually select lower gears. |
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I have an '06 M35x and I am getting 19 mpg. I have only checked gas mileage twice in 10,000 miles. 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.
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Replying to: joegolfer1 (Feb 08, 2007 12:21 pm) 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? |
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Dang! You couldn't wait until Feb 8 to ask that question?  We were headed full-on into 2 years of nobody caring about the gas mileage of this car! 
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Maybe all the M45 (and M35) owners are used to the terrible gas mileage and trying to forget about the pain? For now, the gas price is low, so no big deal, but it must be hurting back in late 2007 and majority of 2008.  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? 
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I have a new 2008 M35x with 500 miles on it that is getting about 10 MPG (mostly city) and revving high 2900 RPM's at 70 mph. It does not seem to go into overdrive. Has anyone else had this issue or do you think it will improve after some additional miles?
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Replying to: avj23 (Jan 28, 2009 8:35 pm) 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.
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