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  #1  
Old 11-23-2011, 05:13 AM
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Traveling from NJ to SC

I want to do it in one shot, I think I can achieve at least 25 mpg based on some preliminary tests I have done. The amazing thing is the X5 is getting better mileage than my G37
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  #2  
Old 11-23-2011, 09:31 AM
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We have done a day trip of ~ 675+ miles from western NC to NJ, a couple three times per year, for the past decade. Our '01 E53 has a 5 spd manual, and thus our highway rpms are substantial, and detrimental to big mpg numbers...but, we often get high 22s and occasionally 23+ on those trips, based on arithmetic, not the mpg readout.

The difficulty in predicting 'expected' mpg is the potential stop and go traffic jams around DC or Balto, and any other unforeseen construction or accident slow downs along your route(s). Also 'load' plays a role, as does ambient temps and gusty winds, imo, from viewing the anecdotal 'results' over a decade worth of those trips.

Otoh, our '02 VetteVert has made that trip regularly too, and that sumbitch does 28-30+ mpg on every trip...fwiw.
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PS: EZ Pass is your friend, in terms of rolling through the several tolls on I-95 vs stopping to get in line to pay.
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Last edited by motordavid; 11-23-2011 at 01:49 PM.
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Old 11-23-2011, 02:07 PM
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I am travelling late at night arriving early in the morning. I expect to be able to use auto cruise at 65mph for most of the trip. I think I can do it, will update the group with the results.
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Old 11-23-2011, 02:44 PM
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Quote:
Originally Posted by 300hp View Post
I am travelling late at night arriving early in the morning. I expect to be able to use auto cruise at 65mph for most of the trip. I think I can do it, will update the group with the results.
Ah, '65': that will help considerably in a mpg chase. We tend to keep it just under 80 and between the fences, when we can run hard.

A 65 cruise will add some time. It is frequent trip for us, over the years. That night shot will reduce the DC-Balt-NJ traffic considerably.
GL, mD
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Old 11-23-2011, 02:48 PM
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At 65 you will get great mpg. I have trouble keeping her under 90. When I did do a trip around 70-75 I was getting 21 mpg on my 4.4. You can def get good mpg on your 3.0 at 65!
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Old 11-23-2011, 05:02 PM
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Thanks for the input guys. Naz24, you are lucky to travel over 90 and not get caught Can't blame you though, the X5 is a sleeper

I will be travelling with my kids, when they are in the car Daddy behaves. I will probably do between 65 and 75. My goal is to achieve at least 25 mpg.
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Old 11-23-2011, 09:59 PM
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Quote:
Originally Posted by 300hp View Post
I want to do it in one shot, I think I can achieve at least 25 mpg based on some preliminary tests I have done. The amazing thing is the X5 is getting better mileage than my G37
I would agree about the gas comparison between the G37x and the X but we are currently getting a little over 25 with mixed hwy/city in the X and a bit over 23 on the G.

It must be the altitude where I'm at.

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Old 11-23-2011, 10:17 PM
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Speed will rule the day in your quest for 25 mpg. Last May I drove from Houston to Phoenix via I-10, many miles and hours through TX with 80 mph speed limit, set cruise for 85 mph, was showing between 24 ~ 26 mpg with 35d. Have driven 55 mph highway other times for comparison and can see over 30 mpg. 25 mpg with 3.0 at 70? Maybe. 75 to 80? Maybe not.
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Old 11-24-2011, 01:13 AM
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I get 45 mpg on my X5 35d when driving at 30-50mph on "local" flat roads... Anything above 50mph and wind resistance gets into play!
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Old 11-27-2011, 10:31 AM
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Quote:
Originally Posted by ICX5 View Post
Speed will rule the day in your quest for 25 mpg. Last May I drove from Houston to Phoenix via I-10, many miles and hours through TX with 80 mph speed limit, set cruise for 85 mph, was showing between 24 ~ 26 mpg with 35d. Have driven 55 mph highway other times for comparison and can see over 30 mpg. 25 mpg with 3.0 at 70? Maybe. 75 to 80? Maybe not.
On a highway trip, I get about 25.5 mpg on my 35i at ~80 mph. I made a trip of 530 miles on one tank of gas.
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