MPG at 70-75 ? - Saturn Outlook Online Community
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post #1 of 27 (permalink) Old 02-19-2011, 08:01 PM Thread Starter
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MPG at 70-75 ?

So I got curious.
Ive never driven at 70-75 for any long distance.
So I went for a test.
I hooked up my laptop to the OBD II port.
Gassed up the tank- let the gas pump shut off on its own.
Reset the DIC.
Took the streets and I got on the freeway. Intent was to hit 75 and stay there. But due to traffic a few times we slowed to 45-50 for a few minutes.
but then Id get back up to the 70-75 range. After 30 min of driving I got off the freeway- and took some streets to get back on in the opposite direction.
Came home.
There is a hill I had to climb in both directions. For this- I head over to the slow lane- and drive up at about 60- on the way down- the trans is in L and 6 so as not to engage descent control. (engine braking).
Once I got off the freeway- I headed straight to the same gas station and used the same pump I used when I started. Once I parked at the pump I stopped the laptops recording data.
Here are the Results.....

Traverse DIC-
TRIP- 69.2 miles
DIC Gal used- 2.7
DIC MPG- 25
AVG speed 62.7

At the PUMP
GAL PUMPED- 2.66 (I let the gas pump auto shut off).
Hand calc MPG-26 69.2 miles/2.66 galons=26.01 mpg
cost to refill=$9.48 (@$3.55 per gal of regular).

Now heres the amazing part.... see the numbers below.. of the data gathered from the OBD port.
It calculated I used 2.66 gallons--- same amount that the gas pumped AUTO shut off- and very very close to the DIC.
It shows 25.95 MPG-- I calculated 26 vs DICs 25
Total trip cost... $9.43 as per laptop..... I paid $9.48.
It shows 68.9 miles traveled as compared to DIC 69.2. pretty close to what the DIC showed.

Conditions--- only me on board. No AC. Outside temp 55 deg.


2010 FWD LT1-Gold Mist Metallic- seats 8.<br />Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.<br />2013 Equinox 3.6L -&nbsp; &nbsp; 16,755<br />2010 Traverse 3.6L-&nbsp; &nbsp; 74,300<br />2003 Trailblazer 4.2L-170,500
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post #2 of 27 (permalink) Old 02-19-2011, 09:15 PM
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Re: MPG at 70-75 ?

That's almost dead on exact, nice.




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post #3 of 27 (permalink) Old 02-20-2011, 03:22 PM
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Re: MPG at 70-75 ?

Interesting. On our Thanksgiving trip across the country, I had 4 tanks of gas. I run about 8-9 over the speed limit, so in OH & IL that's 73-74 and in IN and MO that's 78-79. Two of the tanks were 19.8 MPG, one was 22.6 MPG and the other 21.7 MPG. I was pretty disappointed, honestly.

These were mostly highway miles, but fully loaded with 5 of us, the dog and a load of Christmas presents and stuff for the 5 day weekend. I guess we likely had 550 - 600 lbs than you did, maybe that's the difference.




2007 Toyota Prius Touring<br />2005 Mazda3 5-door<br />1998 Ford Escort SE<br />1960 Ford Thunderbird<br /><br />SOLD: 2010 Outlook XR-L - Cocoa / Ebony Leather<br />AAQ ABC BTV CJ2 DD8 DS3 KA1 KV1 N10 PCP PCQ T83 T96 TB5 UD7 UG1 UQA UUI UVC V92 Y9
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post #4 of 27 (permalink) Old 02-20-2011, 05:23 PM Thread Starter
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Re: MPG at 70-75 ?

Ill find out in about a month- when I take a 4200 mile round trip.
4 adults, 1 baby, cargo bag on roof, and hitch rack on the rear..

2010 FWD LT1-Gold Mist Metallic- seats 8.<br />Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.<br />2013 Equinox 3.6L -&nbsp; &nbsp; 16,755<br />2010 Traverse 3.6L-&nbsp; &nbsp; 74,300<br />2003 Trailblazer 4.2L-170,500
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post #5 of 27 (permalink) Old 02-20-2011, 06:47 PM
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Re: MPG at 70-75 ?

We determined making that trip that we need an add on cargo carrier. I missed my van on that trip for sure. Thinking a hitch mount instead of roof so I don't add wind drag. I bet that's gonna hurt you. It'll be interesting to see, you're a bit more loaded down than I was.




2007 Toyota Prius Touring<br />2005 Mazda3 5-door<br />1998 Ford Escort SE<br />1960 Ford Thunderbird<br /><br />SOLD: 2010 Outlook XR-L - Cocoa / Ebony Leather<br />AAQ ABC BTV CJ2 DD8 DS3 KA1 KV1 N10 PCP PCQ T83 T96 TB5 UD7 UG1 UQA UUI UVC V92 Y9
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post #6 of 27 (permalink) Old 02-20-2011, 08:51 PM Thread Starter
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Re: MPG at 70-75 ?

planning on only stuffing clothes up top. Soft stuff I can squish to make the cargo bag as low profile as I can.

2010 FWD LT1-Gold Mist Metallic- seats 8.<br />Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.<br />2013 Equinox 3.6L -&nbsp; &nbsp; 16,755<br />2010 Traverse 3.6L-&nbsp; &nbsp; 74,300<br />2003 Trailblazer 4.2L-170,500
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post #7 of 27 (permalink) Old 02-21-2011, 12:43 AM
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Re: MPG at 70-75 ?

We're planning our summer trip last week. We decided we needed additional space for our first trip with the Outlook. We found this cool carrier that has dual use as a cart too. That should come in handy for camping.

I'll probably order one in the next couple months. I would hope that the rear carrier will not affect MPG too negatively - at least better than a rooftop carrier.
Attached Images
File Type: jpg hitchcarrier.jpg (115.5 KB, 10 views)

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post #8 of 27 (permalink) Old 02-21-2011, 09:42 AM
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Re: MPG at 70-75 ?

I have a rear carrier and have not noticed any negative MPG while using it; I too do not like to load the top of a vehicle with stuff especially with dual glass roofs

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post #9 of 27 (permalink) Old 02-21-2011, 12:49 PM Thread Starter
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Re: MPG at 70-75 ?

Id never seen that hitch rack with wheels. very interesting.

This is my hitch rack... thought I Have not loaded it up HEAVY on the Traverse- like I would on the Trailblazer on trips to Guadalajara.



Dont think Ill have the Traverse this loaded up.


2010 FWD LT1-Gold Mist Metallic- seats 8.<br />Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.<br />2013 Equinox 3.6L -&nbsp; &nbsp; 16,755<br />2010 Traverse 3.6L-&nbsp; &nbsp; 74,300<br />2003 Trailblazer 4.2L-170,500
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post #10 of 27 (permalink) Old 02-21-2011, 01:33 PM
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Re: MPG at 70-75 ?

That rack with the casters is interesting, where did you find it? I haven't decided what I'm going to get, I won't likely need it before the fall.




2007 Toyota Prius Touring<br />2005 Mazda3 5-door<br />1998 Ford Escort SE<br />1960 Ford Thunderbird<br /><br />SOLD: 2010 Outlook XR-L - Cocoa / Ebony Leather<br />AAQ ABC BTV CJ2 DD8 DS3 KA1 KV1 N10 PCP PCQ T83 T96 TB5 UD7 UG1 UQA UUI UVC V92 Y9
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