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Buick LaCrosse: Real World MPG

60 messages,  Last post on Mar 25, 2008 at 8:49 AM

You are in the Buick LaCrosse Forum. Your Hosts are pat & karens

What is this discussion about? Buick LaCrosse, Fuel Efficiency (MPG), Sedan


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#41 of 60
Long Road Trip in 2006 CXS by hitman1970
Dec 25, 2006 (12:53 pm)
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Just drove over 1200 miles from Tennessee to Massachusetts for the holidays. My 3.6L engine averaged 25.5 MPG for the trip. Pretty decent mileage. We were stuck in several long traffic jams once we hit the New Jersey/ New York area. The car now has 5300 miles on it and averages about 21 MPG overall. Just had an oil change and the tires rotated before the road trip. Am now running synthetic oil in it and will consider actually using the Oil Life System versus mileage for oil changes.
#42 of 60
Fuel ecomony by johnsvette
Feb 04, 2007 (11:51 am)
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I just checked this post and at least I'm not alone in the poor mileage, I have a 05 CXS with the 3.6L I've had it for 11 months. the best MPG is ever got was on a trip 24, it averages 15 /16 MPG (70%city 30%highway)I live in the northeast and now its averaging 13.5 to 14.5 MPG this winter. I know the winter you usually drop mileage, but what sucks is I traded in a 04 trailblazer 4X4 that was getting between 13 and 14MPG in the same winters with the same driver going the same places. and to think the dealer told me there was no complaints about fuel economy.
#43 of 60
Re: LaCrosse Gas Mileage [bluecxs] by hitman1970
Feb 24, 2007 (9:17 am)
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Replying to: bluecxs (May 23, 2006 4:19 pm)

2006 CXS with 5 months of ownership 8700 miles, 21.1 MPG 50/50 driving, and still have a quiet interior. Hope your situation improves.
#44 of 60
Re: LaCrosse Gas Mileage [hitman1970] by markfnc
May 25, 2007 (12:05 pm)
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Replying to: hitman1970 (Feb 24, 2007 9:17 am)

Just filled up for the first time. 2007 CX with 3.8 398 miles and it took 15.8 gal to fill up 25.2 mpg. Probably 60% hwy.
 
After the fill up i got right on the hwy and drove about 30 miles at 58 mph with cruise on. The computer said 32.2 mpg. Of course at 58 I thought i was gonig to get run over.
#45 of 60
Update by hitman1970
May 25, 2007 (7:29 pm)
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So far I have 12000 miles on my 2006 CXS. I have an average of 21.9 on my DIC now. I have had the the car for eight months now. It has been a pleasure to own the entire time. I have driven from Tennessee to Massachusetts and down to Alabama with it. Excellent comfort on long road trips.
#46 of 60
Re: LaCrosse Gas Mileage [richard70] by dnguy
May 30, 2007 (8:37 am)
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Replying to: richard70 (May 13, 2006 6:09 pm)

I have a 2007 CXL with 15,000 miles. Fuel monitor is reporting 32/33 mpg while car is going between 55-60 mph in cruise control. This is optimal.
 
Higher speeds (say, 70 mph) will cut this by 10-15%. Also speeding up and slowing down frequently, also hard on mpg.
 
For best fuel economy, stay at the speed limit, and use cruise control. Other cars will speed by at 70-80 mph but so what.
 
DNGUY
#47 of 60
2007 Lacrosse CX real mileage by markfnc
May 31, 2007 (3:25 am)
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I have a 2007 LaCrosse CX. My 1st tank was 25.2 mpg, and the 2nd tank was 25.8 mpg. Those are actual miles divided by gallons put in. On the 2nd tank the computer reading for the entire tank was 25.7 mpg vs the actual of 25.8 so that was real acurate. I drove one stretch right after I filled up the 1st time. drove 30 miles on the higheay with the cruise on 58 mph, adn the computer said 32.2 mpg wgwen i got off the highway. I want to take a trip to see how close to 30 i could really get.
#48 of 60
2 month update by markfnc
Jul 24, 2007 (3:29 am)
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2 month update.
 
Total miles 6319
Total gallons used = 243.16
Overall MPG = 25.99
Best tank MPG = 27.279
Worst tank MPG = 23.495
 
changed oil 4132
 
No problems
 
We were on vacation last week, so the car was not driven that week as this is a company car, and we took the wives Freestar. So actually the miles driven per week is about 702.
#49 of 60
3 month update by markfnc
Aug 21, 2007 (12:49 pm)
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3 month update
Total miles = 9516
Total gallons used = 368.50
overall mpg = 25.82
best tank mpg = 27.279
worst tank mpg = 23.495
 
changed oil 4132, then 8275
 
no problems. The transmission shifts smooth, the engine is quiet. Of course I have never been in a Lexus so can't compare. But for the cars / SUV / Mini vans I have driven this is the quietest, and smoothest. As stated before the driver seat needs lumbar control.
#50 of 60
Just shy of one year by hitman1970
Aug 24, 2007 (8:48 am)
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Replying to: markfnc (Aug 21, 2007 12:49 pm)

Now have 14,550 miles on my CXS. Have done a lot more city driving recently and my overall mileage is now 21.1 MPG. No issues at all with the car. Still a pleasure to drive. I had done two oil changes and replaced the air filter so far.

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