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2006 Buick Lacrosse CX 3.8l #4447148
07/02/17 03:27 AM
07/02/17 03:27 AM
Joined: Jan 2013
Posts: 2,127
Texas
WyrTwister Offline OP
WyrTwister  Offline OP
Joined: Jan 2013
Posts: 2,127
Texas
Bought a used Buick , last Monday , with 37,000 + miles . This correlates with Car-fax .

The dealer did an oil / filter change .

From looking at documentation , the factory OCI appears to be 3,000 miles . I have no problem with that .

My question is , I am thinking the NAPA 5W-30 Dexos synthetic oil I purchased on sale ( a month or two back ) for our Sonic , should be OK for the Buick ?

Bought a Fram PH3387A filter this afternoon at Walmart . To have one on hand . Are those Fram filters OK ?

Plan to order 6 - 12 filters from RockAuto.com , depending on there sale prices & freight .

Thanks , :-)
God bless
Wyr


Wyr
God bless
Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447156
07/02/17 03:52 AM
07/02/17 03:52 AM
Joined: May 2005
Posts: 10,570
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,570
ROCHESTER, NY
Yes, that oil should be perfect. The oil filter(PH3387a) is OK for an oil change but buy a step up or two for the rest of your oil change intervals (OCI). Others will chime in with more info.

Last edited by Char Baby; 07/02/17 03:58 AM.

"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447161
07/02/17 04:31 AM
07/02/17 04:31 AM
Joined: Apr 2015
Posts: 182
Houston, TX
czbrian Offline
czbrian  Offline
Joined: Apr 2015
Posts: 182
Houston, TX
Doesnt't that year model have an oil life monitor? I pulled up a manual using google and it says to use the oil life monitor unless it is accidently reset, in which case change at 3000. If you have an oil life monitor, you should just follow it and if you want to be conservative, just change at 15% or something. I don't think the 3.8 in those was hard on oil and you will using a better oil than originally specified.

Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447166
07/02/17 04:55 AM
07/02/17 04:55 AM
Joined: Jun 2008
Posts: 272
Minnesota
bmod305 Offline
bmod305  Offline
Joined: Jun 2008
Posts: 272
Minnesota
Replace the coolant elbows. About the only thing on a 3800 that will leave you walking home.

Dave

Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447189
07/02/17 06:13 AM
07/02/17 06:13 AM
Joined: Feb 2013
Posts: 3,117
Virginia
bigt61 Offline
bigt61  Offline
Joined: Feb 2013
Posts: 3,117
Virginia
Any dino SN oil will be fine for 3k - and any cheap filter will work. That 3.8 is almost indestructible. The NAPA Synthetic you have should be good for at least a 6,000 mile OCI, regardless of time or short trips - just keep it topped off. Sounds like a sweet low mileage car to me.


92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
70 Camaro 5.7L 59k
Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447232
07/02/17 07:26 AM
07/02/17 07:26 AM
Joined: Dec 2013
Posts: 2,098
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,098
socal
If u are going to get the filters in bulk from rockauto, I would just the oem ac delco pf47 filter. They are better than the fram and a tiny bit less expensive. They can be used for the entire olm or less. If u are gonna do 3k oci, use cheap or clearance oil and cheap jobber oil filters

Last edited by barkingspider; 07/02/17 07:28 AM.

06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: 2006 Buick Lacrosse CX 3.8l [Re: czbrian] #4447242
07/02/17 07:59 AM
07/02/17 07:59 AM
Joined: Jan 2013
Posts: 2,127
Texas
WyrTwister Offline OP
WyrTwister  Offline OP
Joined: Jan 2013
Posts: 2,127
Texas
Originally Posted By: czbrian
Doesnt't that year model have an oil life monitor? I pulled up a manual using google and it says to use the oil life monitor unless it is accidently reset, in which case change at 3000. If you have an oil life monitor, you should just follow it and if you want to be conservative, just change at 15% or something. I don't think the 3.8 in those was hard on oil and you will using a better oil than originally specified.


Yes , I think it has an oil life monitor .

Thanks ,
Wyr
God bless


Wyr
God bless
Re: 2006 Buick Lacrosse CX 3.8l [Re: bmod305] #4447245
07/02/17 08:03 AM
07/02/17 08:03 AM
Joined: Jan 2013
Posts: 2,127
Texas
WyrTwister Offline OP
WyrTwister  Offline OP
Joined: Jan 2013
Posts: 2,127
Texas
Originally Posted By: bmod305
Replace the coolant elbows. About the only thing on a 3800 that will leave you walking home.

Dave


Is this what you are referring to ?

https://www.rockauto.com/en/catalog/buick,2006,lacrosse,3.8l+v6,1432026,cooling+system,bypass+hose,2155

How many of those are used on the 3.8l engine ?

Planning on replacing the radiator hoses , maybe heater hoses , maybe thermostat / gasket . And coolant ( Dexcool ) . Due to age , not miles .

Can add those elbows to the list , too .

Thanks ,
Wyr
God bless

Last edited by WyrTwister; 07/02/17 08:08 AM.

Wyr
God bless
Re: 2006 Buick Lacrosse CX 3.8l [Re: bigt61] #4447247
07/02/17 08:06 AM
07/02/17 08:06 AM
Joined: Jan 2013
Posts: 2,127
Texas
WyrTwister Offline OP
WyrTwister  Offline OP
Joined: Jan 2013
Posts: 2,127
Texas
Originally Posted By: bigt61
Any dino SN oil will be fine for 3k - and any cheap filter will work. That 3.8 is almost indestructible. The NAPA Synthetic you have should be good for at least a 6,000 mile OCI, regardless of time or short trips - just keep it topped off. Sounds like a sweet low mileage car to me.


Do not know yet it it uses any oil . So , topping it off may or may not be an issue .

We had 4 Chevy Luminas with 3.1l engines . Is this 3.8l V-6 simular / related to the 3.1l ?

Thanks ,
Wyr
God bless


Wyr
God bless
Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447253
07/02/17 08:10 AM
07/02/17 08:10 AM
Joined: Mar 2008
Posts: 7,349
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 7,349
USA
Your Lacrosse should have an OLM that calculates an OCI for you, which can be much longer than 3k.

Nothing wrong with the PH3387A, but I'd rather use an Ultra or a Wix-made filter, such as the ST3387 (or any of Napa's house-brand filters).

Napa Synthetic is rebranded Synpower and a quality synthetic oil at a great price when on sale at Napa. While dexos isn't required in your 2006 Buick, there is certainly nothing wrong with using it, and in fact it's probably better than any oil available when your car was brand new.

Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447259
07/02/17 08:14 AM
07/02/17 08:14 AM
Joined: Jun 2016
Posts: 3,566
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
MN
Originally Posted By: WyrTwister
We had 4 Chevy Luminas with 3.1l engines . Is this 3.8l V-6 simular / related to the 3.1l ?

No, completely different origin and evolution since the block was used in https://ateupwithmotor.com/model-histories/buick-special-skylark-rover-v8-3800-v6-history/ many years ago. Chevy V6 is an evolution of the original 2.8L V6 used in Citations from 1980+, completely different. No common parts.

Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447263
07/02/17 08:18 AM
07/02/17 08:18 AM
Joined: Jun 2016
Posts: 3,566
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
MN
In that car, I'd use SuperTech 5w30 Full Synthetic at Walmart for a great value (Warren Oil Company). Although, if NAPA has a $3/quart sale on their synthetic, then go with that, a re-branded sodium-additive Valvoline, a great deal. 5w30


The best oil filter is a Fram Ultra (wire-backed media, silicon ADBV, best filtering performance), again from Walmart, costs about $7 bucks more than cheapo brand oil filters.

Last edited by oil_film_movies; 07/02/17 08:20 AM.
Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447265
07/02/17 08:27 AM
07/02/17 08:27 AM
Joined: Jun 2016
Posts: 3,566
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
MN
Originally Posted By: WyrTwister
Bought a Fram PH3387A filter this afternoon at Walmart . To have one on hand . Are those Fram filters OK ?
Plan to order 6 - 12 filters from RockAuto.com , depending on there sale prices & freight .

The Fram PH's are fine. Fram's Ultra is XG3387A (note the "XG" part). Ultra is clearly the better one, but the PH's have good reputations, and the PH's do have some glass fibers mixed into the cellulose paper filtering media which helps performance.

The main thing: Never buy Purolator. They have horrible reputations for ripping holes in the filtering element.
Any oil filter except Purolator will do. (Although the more expensive Purolator Boss model is OK.)

Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447270
07/02/17 08:31 AM
07/02/17 08:31 AM
Joined: Jun 2016
Posts: 3,566
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
MN
That Buick 3.8L is a good one. Iron block, iron heads, all iron. Great torque and MPG. https://en.wikipedia.org/wiki/Buick_V6_engine
GM should have continued making it and they should have put that low-end-torque monster in 1/2 ton pickup trucks as the perfect choice for the low end Work Truck models and cheaper base 1500's.


Last edited by oil_film_movies; 07/02/17 08:32 AM.
Re: 2006 Buick Lacrosse CX 3.8l [Re: WyrTwister] #4447274
07/02/17 08:37 AM
07/02/17 08:37 AM
Joined: Jan 2013
Posts: 2,127
Texas
WyrTwister Offline OP
WyrTwister  Offline OP
Joined: Jan 2013
Posts: 2,127
Texas
Think the NAPA synthetic was about $ 4 a quart . Bought 24 quarts .

Thanks ,
Wyr
God bless


Wyr
God bless
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