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Discussion Starter · #1 ·
I recently drove a rental '12 Impala LTZ and the 3.6 engine combined with the 6 speed automatic seems to have a lot of pep. Definitely better response than my 3.9/4 speed auto combination. However, I heard that some of these 3.6 liter overhead cam engines may have oil burning issues and are not as durable as the 3.9 liter push rod engine. I am not sure how true this is. Any comments?

I thought about trading in my car on a new '012 LTZ, but the resale value is very disappointing - after 3 years/34k miles, my car is worth about $ 12k on trade. This for a car with $ 31k sticker. The car is now worth a whopping 40 % of its original retail price! This is truly ridiculous! A 3 year old low mileage Honda Accord would be worth at least 75% of its original sticker price.
 

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Price is what attracted me to even look at an Impala.

Found my '08 in Sept '09 - had about 40,000 miles on it - figured it had just rotated out of a rental fleet. Got to wondering how a rental could get 40,000 miles on it in a year, then concluded that it was probably bought in late '07 so that the rental company could get almost two calendar years' worth out of it and still sell it while it was only one model year old.

Dealer had it on the lot since July, had dropped the price to $14,900, and that included the brand new set of RS-A tires complete with the manufacturing whiskers still on them, which I figured was about $1,000 worth of tires. The car was immaculate - leather was clean without any creasing, paint was perfect - for all purposes, it looked new. Pfffft, for a year-old full-size vehicle, too hard at the time not to take a chance on.

The attraction diminished greatly in the following months as the various problems popped up - three of the four wheel bearings failing, two power door lock assembly failures, evap purge solenoid failure, power mirror switch failure, A/C compressor failure, as well as the rear alignment issues typical for that model year.

But, back on topic - have been pleased with the 3.9L. The DOD still works fine, and oil consumption is still above 3,500 miles per quart. It does amaze me that the 3.6L is rated for nearly the same horsepower as the 5.3L, although I suspect the 3.6L really has to get busy with the RPMs to hit max horsepower.
 

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I thought about trading in my car on a new '012 LTZ, but the resale value is very disappointing - after 3 years/34k miles, my car is worth about $ 12k on trade. This for a car with $ 31k sticker. The car is now worth a whopping 40 % of its original retail price! This is truly ridiculous! A 3 year old low mileage Honda Accord would be worth at least 75% of its original sticker price.

Seems any car the the "car and driver turtle neck guys" brand as a basic transportation, or has less following hype drops price in 3 years to much below the others.......and is why it is the only vehicles I purchase when 3 years old.

Look at the old Grand Marquis. After 20 K miles with grandma driving, who wanted a used one, and look how much car you got for the money.

Car pricing is based on what is popular or brand following (Honda Accord), not necessarily real value.
 

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Discussion Starter · #4 ·
Anybody can comment on the engine issues (3.9 vs 3.6 and on the oil usage rumor for the 3.6 engine)?
 

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OEM LOL
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I see a lot posted online on different forums about the 3.6 using oil and the response is always 1 quart oil usage is normal yada yada but I don't own a 3.6 or 3.9 so I don't have any first hand experience for you.

Your best bet would be to Google it and do some research
 

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Papa SSmirf
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While I don't have any experience with the 3.6 or the other 6 cyl's, I can say that the oil consumption issue is rather common. I even have the same issue with my LS4 5.3L. I drove it back up to RI back in January, and it needed a quart because it'd consume it.

I just had the oil change done at the dealer (because I couldn't get the damn drain plug off, and I don't have a jack or the place to change it...), and the service tech said that it's a common thing for the newer engines to consume a quart every so often.
 

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The 3.9 L is a pushrod engine that puts out 242 HP with a 4 speed transmission, while the 3.6 L is an overhead cam engine that puts out 300 HP with a 6 speed transmission. The 3.9 L is a very durable engine and has plenty of power, with just a few mods. I dont have DOD. Only time will tell how durable the overhead cam engine is.
 

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Back in Black
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have 33,000 miles on 12ltz no loss of oil at all between oil changes, can't talk to 3.9 engine
 

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Have had my '12 almost a year now. Typically change the oil and filter every 3 months or 5,000 miles max. When I took delivery, it had 88 km on the odometer.

The first oil change I did at 2,000 km. My idea of "break in" is a modified version of this one

Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power

Through the government fleet I get access to, I have performed this on dozens of new pickup trucks and SUV's, all with uniformly excellent results. Bit more power, bit better fuel economy, zero oil consumption past break in.

The first oil change, my 3.6 was down about halfway between full and add. Every other oil change, including one at 7,500 km with the OLM claiming 47% remaining, has been ZERO oil consumption.

First two oil changes were complimentary by the dealership, they refilled with Dexos Goodwrench oil. I paid them to do another oil change, then about two weeks ago did it myself. Used the dealership oil filter and Mobil 1 Extended Performance 5W-30.

Am waiting to hear back on the oil analysis.

I did have a rental 2012 that burned oil. On cold start, a puff of blue smoke came out. When I picked it up, I popped the hood and checked the oil with the rental person claiming they had already checked everything. Oil was barely on the stick.

"What? It burned 4 litres sitting here in your parking lot?"

That Impala, I had to add a litre of oil every fill up. Really scared me off the new engine, until our fleet maintenance manager told me the problem was too long oil changes, and not using a Dexos rated motor oil.

We have 7 of the 2012 Impala and they have had zero issues. A lot really depends on how well they are maintained. Direct injected gasoline motors put a lot of soot in the oil. They specify Dexos for a reason, and I personally would NEVER stretch past 3 months or 5,000 miles.

Unless I ran a bypass oil filter to capture all that soot

The 3.9 seemed to be a good motor. No comparison in hp and torque to the new 3.6.
 

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^Agreed.

The 3.9L was an adequate engine.

This 3.6L is a real sweetheart. Power delivery is ridiculous. Gas mileage is excellent. I've only had my 2012 for a few weeks now, but I absolutely love it, mainly due to the 6speed automatic and the 3.6L.
 

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I found a 2012 Impala LT with just under 25K miles for just under $14K. Which based on my recent searches is a pretty good deal. I put a hold on it at the dealer and have a tentative test drive and anticipate purchasing tomorrow. It is a Chevy Certified Used vehicle (from what I understand that means it still has the original warranty in place). As I was continuing my research into the specific vehicle I found out it was previously a rental vehicle and the front wheel bearings were replaced (assuming part of the certification inspection process). My questions is whether I need to be extra wary of this car because it was previously a rental vehicle, or if the Certified Used car tag trumps my worries? Any info is greatly appreciated...This would be my first chevy car (I've had a couple Dodge Trucks and a Chrysler Van, a Nissan and some other foreign cars). I'm not completely stupid when it comes to repairs, but don't want something that is going to constantly be in disrepair.
 

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Optimus Primal Bear, please let me know if you have any questions along the way! It's great you're thinking about an Impala, and I'd be happy to provide its build sheet and existing warranty information, if you like. I'm happy to help where I can and am available via private message for further assistance.

Best,

Katie
Chevrolet Customer Service
 

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8th Gen Antagonist
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It only has 25k on it, so if there is any wear and tear going on I would move on. Not to say the hubs are a red flag, they are a common failure on these cars, so that could be nothing. As long as everything feels nice and tight on the test drive, I wouldn't worry too much.
 

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Four-Seasons Fan!
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My 2008 LTZ w/ the 3.9 (& AFM of course!) burned 1.5 qts. over 3,400 miles!! Just completed an oil-cons. test at my dealer, so it's documented.

The kicker here....it's only got 30,100 miles as of today...:gaah:!
Faron
 

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LIFETIME HILLBILLY
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Oil consumption seems to be common with those broski :eek:k3:
 

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As I was continuing my research into the specific vehicle I found out it was previously a rental vehicle and the front wheel bearings were replaced (assuming part of the certification inspection process). My questions is whether I need to be extra wary of this car because it was previously a rental vehicle, or if the Certified Used car tag trumps my worries?
The new direct injection 3.6 is a great motor. I would ask if that retired rental car was serviced at GM dealerships - where it received Dexos motor oil - or at a discount place that put in whatever garbage they had in stock. To avoid a lawsuit I'll make up a name for that place and call it Iffy Noob.

Direct injection motors seem to put a lot of soot into the oil, so in that way a gasoline direct injection motor seems to have something in common with a diesel motor. The intake valve deposits that seem to plague the German direct injection motors are complicated to understand, but oil volatility seems to play at least a small part.

Too long oil change intervals have been known to cause timing chain problems with early 3.6 motors. Rental agencies hate to spend a dime on maintenance so it would be wise to ask how often the oil was changed, was it documented, etc.

If it was serviced with Dexos or equivalent than the motor itself should be fine. If the hubs were replaced, and it still has balance of factory warranty, should be fine.

I would consider an early initial transmission service too. The 6 speed auto doesn't have a drain pan or an easily accessible filter.

AutoTransTech: 6T70/6T75: The Future is Now, Part 1 (Steve Garret, Gears Magazine)

Hope it works out
 

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LIFETIME HILLBILLY
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No idea, but I know jiffy lube has a habit of fucking up people's cars, and trying to sell useless services that they may or may not even complete... I wonder if they are somehow related?
 

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Chevy Imapla [Fleet] 3.6L Gas/Ethanol V6 300 @ 6500 RPM 262 @ 5300 RPM

The Back Story
I had been driving the 2012 Chevy Impala Flex Fuel, 6spd, 3.6 Vtec for over a year, started out with 1260 miles. got it via Enterprise Auto Rental, as they are the only car rental agency you can acquire one from.

I liked it so much, I purchased a 2014 low with 19,000k miles Same exact set up.
Now remember this Impala is not the Dealership impala. This one is known as [Fleet] or Police car.
they were designed by Chevy for Enterprise Rental Car, using various leftover frames and other good stuff. One sleeper muscle car is what it is. 3.6L Gas/Ethanol V6 300 @ 6500 RPM 262 @ 5300 RPM 262 ftlbs torque. You better white knuckle that steering wheel when you punch it from a dead stop. You will hit the curb on the passenger side, if you don't. Shaft is shorter on the right front, longer on the left, and if you got a good hold of the wheel, that car is going to pull hard to the right , then hard to the left.

Oil Consumption.
[ this engine does not burn oil. It vaporizes it, and eliminates it right through the exhaust without those tell tale signs of actualy burning it with the gas mixture.]

it is not unusual for this vehicle to use one quart every 2 to 3 thousand miles.
I got three out it. However they do use oil. You should check the oil once a week or more depending on how you drive. I drive mine like I stole it. Always Dexos. It's a Dexos oil system.
very close tolerance engine, that's why it's always 5w 30.
If you want to, I do, I run Marvel Mystery Oil in it. Chevy dealer lets me bring my own Dexos, a
five quart container, and then I add the Marvel Mystery Oil. Now , because Marvel thins out the Dexos so dramatically, the engine will use a quart every 1000 miles. Marvel does not void the Dexos warrenty.

You can drive safely with one quart down, so that means the oil will be at the very bottom of the stick, showing up but barely.

OK now if it is using more oil then that, next oil and filter change. check the mileage start and finish at the next 1,000 mile time frame. If it is a quart low, then it is vaporizing too much oil. That engine does not burn the oil, rather it Vaporizes it right out the exhaust, via the air and catalyst converter set up map sensor, O2 ect sensors.
Your Chevy dealer ship after you tell them it is using a quart or more every 1000 miles will have you run your car according to a time schedule that will have you pay several visits to the dealership which
will analyze the oil consumption, and then fix it. Chevy does not want that car to be running a quart low every thousand miles.
I have not encountered this problem.

The engine Vaporizes the Oil
so you will never have those blackened exhaust pipes as a warning, so don't be lazy.
I always check the oil at least once a week, especially when hitting it hard. This is one fast little bad ass. sleeper car. Looks ma and pa until you get on it.

Ok, I like this car so much, I just traded in my 2014 for the 2016. Exact same car bumper to bumper, black on black, moon roof, 18 inch wheels Goodyear Z/a high performance tires, a real fast 3.6L Gas/Ethanol V6 300 @ 6500 RPM 262 [ftLbsTorque] @ 5300 RPM V-tec electronic six speed.
I got this one, ordered special from Enterprise Auto Sales, Warren Michigan , had it shipped to West Palm Beach Enterprise Auto Sales, and they all made a great deal for my trade in.
If you want this car you can get it from Enterprise. Just find the one you want, if not local have them ship it from point of origin to the Auto Sales lot where you order it from, and just get your trade in to your satisfaction. Shipping cost me $1328 money well spent dollars.
Other wise you will never get it for less, nor low miles . They sold this 2016 to me with 21000 miles on it. 100,000 mile drive train warranty, bumper to bumper 36,000 miles all chevy factory warranty.
 
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