Last post on Jun 30, 2013 at 8:40 AM
You are in the Buick LaCrosse
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Buick LaCrosse, Sedan
#1165 of 2056 Re: Reply:CXL 3.0L MPG = 31> Is 93 Octane Gas harming my CXS? [gberpa]
Nov 01, 2010 (3:22 am)
EPA has finally released figures for combined mileage of Lacrosse. Go to new cars here and chose buick. It lists lacrosse, 2010 & 2011.
The figures shown make me wonder if GM has done another dirty deal with EPA as they did a few years back when making a truck ethanol capable.
2010 shows combined mileage for: 2.4L = 23MPG, 3.0L = 20MPG & 19MPG with AWD, 3.6L = 21MPG
2011 the 3.0L is not shown: 2.4L =23MPG, no difference for AWD, 3.6L = 20MPG.
I have to wonder if these were taken accurately from the EPA or their dart board.
#1166 of 2056 Re: Homelink headache [imidazol97]
Nov 01, 2010 (3:51 am)
I tried that before and without success. I even went as far as to watch a couple videos but the result is still the same, nada. I will keep on trying though.
#1167 of 2056 Re: Reply:CXL 3.0L MPG = 31> Is 93 Octane Gas harming my CXS? [gberpa]
Nov 01, 2010 (4:57 am)
Per prior posts the 29 MPG and 27.5 MPG were long (~1500) mile trips and the readings were DIC average at end. The "instant " readings were actually the result of another posters advice- i.e. set the DIC on mileage and then when car is at constant speed, reset the reading and after a few seconds the actual "instant" MPG will appear. As stated, this is VERY much variable due to conditions at the time. The average is more meaningful and close to manually calculated at time of fillup. The EPA estimate is pretty close to the actuals, at least on the 2010 3.0L CXL we have, with highway MPG higher. We needed a 30MPG heavier highway car for trips and the Lacrosse fits the bill.
#1168 of 2056 CXL - Heat and Cooling
Nov 01, 2010 (11:06 am)
I have CXL 2010, airconditioning works well, it blows cool air from the air vent. It is getting cold in MN and I start uisng heat. Heat appears not blowing from the same air vent, but from two vents from the dashboard the one I guess for clear the side windows.
So I turn the heat on (raising temp and vent), did not see air coming out from normal air vents, but from two air vents on dash board.
Is that what you are seeing or something wrong with mine?
#1169 of 2056 Re: CXL - Heat and Cooling [enphan]
Nov 01, 2010 (11:23 am)
I would assume that heat would blow from the bottom vents, not the dash vents, except those on the sides.
#1170 of 2056 Re: Reply:CXL 3.0L MPG = 31> Is 93 Octane Gas harming my CXS? [crankeee]
Nov 01, 2010 (1:35 pm)
From previously mentioned trip using 91 octane added to a near empty tank, I did get 28.6 mpg per the DIC on my 3.6 L at 65-75 mph but it was only about 60 miles.
When you say "set the DIC on mileage and ...reset", do you mean reset the avg mpg (which I've done before) or the odometer/trip1/ trip 2?
Re your comments before on gas brands, I've got a highway jaunt scheduled for Wednesday where there are mainly Sunoco (I use their 91) but when I switch roads, there is a cutoff with a Shell and an Exxon...might try the Shell then.
#1171 of 2056 Re: Reply:CXL 3.0L MPG = 31> Is 93 Octane Gas harming my CXS? [gberpa]
Nov 01, 2010 (1:53 pm)
Comment (from previous poster) was to set the DIC on the MPG readout, which is the average reading since the prior reset and then push the reset at the end of the turn signal stalk. The next reading may fluctuate at first, then will settle on the "instant average". Our old cadillac had a readout for this but not the new software so you have to trick it to get a feel for what it gets in a certain environment and constant speed. ONLY a feel NOT an average as pointed out by others.
Comment on fuel choice: Major brands are only logical choice, but exact one may not matter that much. Newer underground tanks with no sand or water or prior fuels (e.g. Diesel, Kerosene, Fuel oil ) are real important to those injectors IMO so we use majors only. Few pennies saves few dollars!
P.S. We also got 29 at 65-75 on 2010 CXL with 3.0. RPM's probably close.
#1172 of 2056 93 Octane and update on CXS? [crankeee]
Nov 04, 2010 (4:10 am)
Since switching to 93 octane my mpg in city driving has increased from 16.5 to 18.34 mpg. Interestingly, I got the same reading with both the DIC and manual calculation. Also, at 2,800 miles I am getting close to completing the break-in period so I don't know if that is a factor in the improved mpg.
Nonetheless, with each day driving my CXS I am beginning to enjoy it more and more. I feel more confident driving it...in sport, manual or touring mode, bobbing and weaving in and out of morning traffic, able to park in tight spaces and I have become a pro at using the back-up camera. Perhaps it is all perception but the car seems to be running so much more smoothly, no more gear hunting as the transmission shifts are so smooth and gentle.
Everything is holding up well and I have no reportable conditions. Yesterday morning when the temperature dropped to 28 degrees the DIC warned of possible icing and to drive carefully. The heater worked fine in the AUTO mode and was very quiet. So far I have only used the HVAC in the auto mode so I am not sure if the results would the be same in manual mode.
In sum, my CXS gives me undiluted pleasure as I drive to and from work each day. Great car in all respects...and I have no regrets from switching from an Avalon to the Lacrosse.
#1173 of 2056 Re: 93 Octane and update on CXS? [bwia]
Nov 04, 2010 (4:24 am)
Thanks, you give me hope that my MPG will also improve, just over 1500 miles so far.
My thinking is the shifts could be a bit more crisp, that is not so exceedingly smooth. Also it seems they should be a bit earlier with gentle driving, but then that might be negative for this engine.
How much oil life do you have left?
I am a bit surprised at 80% with only 1500 miles. The Ecotec had 10% at 11000 miles, but needed changing because of 1 year requirement.
With colder weather approaching I suspect 0% will be showing before 7K. This engine must be harder on oil than Ecotec?
#1174 of 2056 Re: 93 Octane and update on CXS? [bwia]
Nov 04, 2010 (5:17 am)
What brand of oil are you using? Is it "Top Tier". What is the average MPH shown when you get your MPG. What temp do you set for the HVAC? What is the outside temp range?