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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
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Replying to: infinitim35 (Aug 05, 2009 2:28 pm) 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).
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Replying to: james27 (Aug 05, 2009 3:31 pm)
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Replying to: infinitim35 (Aug 05, 2009 3:47 pm) 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.
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Replying to: shmang (Aug 05, 2009 4:04 pm)
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Replying to: infinitim35 (Aug 05, 2009 4:13 pm) 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.
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Replying to: shmang (Aug 05, 2009 5:58 pm)
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Replying to: infinitim35 (Aug 05, 2009 11:01 am) |
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Replying to: infinitim35 (Aug 05, 2009 6:09 pm) 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.
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Replying to: shmang (Aug 06, 2009 12:04 pm)  80 MPH). Presume that the newer models with 7 sp tranny will help...
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Atlanta, GA to Orlando, FL: Trip Computer: 497 miles, Elapsed time: 7hr 19 min. for an average speed of: 75.3 MPH. Some luggage and about 1/2 way there and back A/C was on. LOTS of cops but they were all busy writing tickets. Still saw 90+ a couple times. 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! |
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