M35 gas mileage question.

[hawkfan]

Let me preface this post by saying that I've already done a search. The results seem to be all over the place as far as "real world" MPG is concerned. I understand that the the M35X has a lot worse mileage than the standard M35. I'm only concerned about the standard M35. I've seen MPG's range everywhere from 14 to 25 for the M35 while searching. I don't know how MPG fell off so badly with the VQ35 as I currently have an I35 that gets close to 30 MPG on the highway and 26-27 MPG in mixed driving. Should the 30 hp increase really affect MPG that much? Does MPG continue to increase as the car breaks in? The only reason I'm agonizing about all of this is because I'm trying to choose between the M and the Lexus GS 300/350 for my next car. I like the agressive styling of the M much, MUCH better though and I'm a big fan of Infiniti after the service my I35 has given me. But 17 MPG is unacceptable from a V-6 powered car in the 21st century. I hope these are just exaggerated MPG figures. Any one else out there want to report their M's MPG? I'd appreciate the info.

[paigoomein]

I have the 2007 m35 (completely stock) and get around 18-19 mixed driving, and 21-22 for highway. I think that it may have to do with how the gear ratios are setup.

also, I was driving a 1996 I30 before and was only getting around 23-23 mixed driving, and maybe 25-26 highway. perhaps you are just a bit easier on the pedal.

[hawkfan]

I have the 2007 m35 (completely stock) and get around 18-19 mixed driving, and 21-22 for highway. I think that it may have to do with how the gear ratios are setup.

also, I was driving a 1996 I30 before and was only getting around 23-23 mixed driving, and maybe 25-26 highway. perhaps you are just a bit easier on the pedal.

I'm actually the lead foot of my family. The I35 cruises at 75-80mph which equates to 2500-3000 rpm. I got a solid 28.9MPG on a recent trip at that speed. They must have made some pretty substantial changes to the gear ratios on the M35 in order for the fuel mileage to suffer that badly. I'm still strongly favoring the M due to its lower cost in comparison to the GS 300/350. The depreciation on the 2006/2007 M is crazy for such a high quality luxury sedan.

[paulc]

Posted this on another thread - these are real life results for a 2006 M35 which have been very consist for at least the last 30,000 miles or so.

I use my M35 sport for commuting back and forth to work and here in the San Fran bay area that means mostly stop and go freeway traffic. Since I reset my trip computer last, which was about 1200 miles ago, my average speed was about 29 MPH and fuel consumption is 16.9 MPG. I have put 35k miles on the car and the fuel consumption has been in that range the entire time that I have owned it.

[Cutlass442]

I have just purchased a 2007 M35X and use it for travelling to work on the highway each day. I checked mine this morning and based on the car reading (which I reset at the last fill-up), I am getting 26mpg...

[mazz]

63000 miles average 22 to 24 mpgmostly all hwyMazz