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Sedans Infiniti M35/M45 Infiniti M35/M45 Real World MPG
90 messages, Last post on Aug 07, 2009 at 11:35 AM
You are in the Infiniti M35/M45 Forum. Your Hosts are pat & karens
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Replying to: altared (Jun 24, 2006 2:06 pm) I will be getting my 2007 M35x in late July and I won't be caring one bit about gas mileage... and we pay a lot more for gas in Canada than you do in USA (just finished spending almost 5 years of my life living in USA). Although this is a gas mileage forum, for me the disappointment with the M35 series' mpg is not paying for the gas. It's that we can get cars with 350 HP at this gas mileage. In other words, I'd expect an engine/transmission in a $50K car that gives me well over 300 HP in return for 17 mpg. It's not a $$$ issue. It's a bothering-to-engineer the car up to contemporary engineering standards (e.g. what Audi is doing with their V6 and, in the fall, their V8, with FSI; or BMW did with its new engines) by giving a lot og HP per mpg -- not dropping a 1995 V6 (although a great one) into a 2006 car. |
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Just completed a round trip yesterday from Raleigh, NC to Newport News, VA with 95% of the travel on the highway. Used several methods of driving (cruise, and pedal to the metal) with decent results. For anyone that has driven that route, here is as close as I can remember to what I did. I had the cruise set on 75 m.p.h. while on US-64, used the pedal to medal on I-95 and stayed in the 80 m.p.h. ball park (due to traffic), and I had the cruise set on about 65 m.p.h. on US-58 (a known speed trap especially in and around Emporia, VA and Suffolk, VA. I calculated that my m.p.g. was around 23.7 (17.5 gals to fill back up w/415 miles) and the computer calculated the mileage at 23.4 m.p.g. (calculated on average I believe). Not sure what you guys think, but I think that is good mileage using regular fuel, with the AC working, on a light load in a vehicle that now has 11,400 miles on it. By the way, I didn't see any other M's on the highway. I did see several FX's and got plenty of gawkers at the rest stop!
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My last tank of the break-in period, I tried regular unleaded (87 octane) and got a little over 17 mpg in mixed city-hgihway driving. Just filled up with 89 octane and immediately seemed to get a jump in mpg to the 22-23 highway and 19 overall range. I'll report in after this tank is used and then next time I'll experiment with 91. |
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Replying to: rlejr66 (Jul 17, 2006 8:50 am) 
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Replying to: pat (Jul 17, 2006 9:45 am) 
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Replying to: rlejr66 (Jul 17, 2006 11:02 am)
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Replying to: pat (Jul 17, 2006 3:37 pm)
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Replying to: rlejr66 (Jul 17, 2006 3:51 pm) 
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| Overall, since I got the car, I've gotten just over 20mpg over 7.5K miles. This is mostly commute traffic (95% highway). Around here, highway runs 65-80mph. There's only one trip about 400 miles each way - essentially all on the interstate. The low was about 16 with a high about 24, most around 20. Right now, the computer is showing 20.4, and it is fairly close compared to the odometer and what it takes at the gas pump. I'd like a little more from it, but considering the relative power available from the RPM at cruise, I guess more is not forthcoming. | |
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I've driven close to 19K miles on my M35 and have average 18.90 MPG - actually calculated this myself. According to the trip computer I average 27 mph during my driving - I estimated 50% highway/50% around town. My gas gauge isn't very accurate but I know I go between 300 and 350 miles between fill-ups.
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