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| [GMCnet] Moving oil filter [message #92553] |
Mon, 19 July 2010 09:55  |
David L Greenberg
Messages: 899
Registered: January 2004
Location: Port St Lucie, FL
Karma: 0
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On Mon, 19 Jul 2010 05:07:00 -0700 Steven Ferguson <botiemad11@gmail.com>
writes:
snip...........
> On another point. Have you seen the initial oil change point on
> new
> GM engines. What is it, 10,000 miles or something like that?
> That is BS. I dumped the oil in my new Colorado at 3,000 miles and
> sent a specimen to Blackstone labs. There was more shit in that
> oil
> than in the pan of a blown engine. The one comment they sent back
> was
> "it was wise of you to change this oil when you did'.
>
Do you suppose some of the crap in the 1st oil change has to do with
intake during production ?
At 12,400 miles I got a msg that my oil needs to be changed on the 2008
CTS.
The mechanic at the Cad dealer showed me a sample and it was still light
colored. I now have 19k
on the car and the last msg on the dash says I have 47% oil life yet. The
1st 12k miles included
a high speed 5,000 mile trip to AZ and back plus dusty conditions while
there. The 7k miles
since (over 16 months) were local.
I don't know whether this is good or bad but I'm not going to 2nd guess
GM as long as I am
still under warranty. And selling one 1 change per year as opposed to 4 x
per year can't be good for the dealer.
David Lee Greenberg
Port St Lucie, FL skype: david.lee.greenberg
Dedicated to the Preservation of the Classic GMC Motorhome
http://GMCmhRegistry.com
http://www.picturetrail.com/gmcregistry
____________________________________________________________
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Dave Greenberg
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http:GMCmhRegistry.com
davegreenberg1@juno.com
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| Re: [GMCnet] Moving oil filter [message #92568 is a reply to message #92553] |
Mon, 19 July 2010 11:50  |
Steven Ferguson
Messages: 3447
Registered: May 2006
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David,
The dash message is nothing more than a computer generated msg based
on miles, not a real indicator of what is in your oil.
Blackstone Labs breaks it down 16 ways to Sunday so not only do you
know what particulate matter is in your oil, you know what engine
component is shedding the metal. The analysis also checks for coolant
in the oil, the percentage of use left in the wear and additive
package, and a silicate indicator so you can see how well your air
filter is performing. It also reveals any trace of fuel in the oil.
I'd say get it out of there now and send a sample in to Blackstone
and see for yourself rather than trust a programmed message.
Yes, this was the initilal oil that my truck was delivered with.
Blackstone will send your as many free test kits as you want.
On Mon, Jul 19, 2010 at 7:55 AM, David L Greenberg
<davegreenberg1@juno.com> wrote:
>
> On Mon, 19 Jul 2010 05:07:00 -0700 Steven Ferguson <botiemad11@gmail.com>
> writes:
> snip...........
>> On another point. Have you seen the initial oil change point on
>> new
>> GM engines. What is it, 10,000 miles or something like that?
>> That is BS. I dumped the oil in my new Colorado at 3,000 miles and
>> sent a specimen to Blackstone labs. There was more shit in that
>> oil
>> than in the pan of a blown engine. The one comment they sent back
>> was
>> "it was wise of you to change this oil when you did'.
>>
> Do you suppose some of the crap in the 1st oil change has to do with
> intake during production ?
>
> At 12,400 miles I got a msg that my oil needs to be changed on the 2008
> CTS.
> The mechanic at the Cad dealer showed me a sample and it was still light
> colored. I now have 19k
> on the car and the last msg on the dash says I have 47% oil life yet. The
> 1st 12k miles included
> a high speed 5,000 mile trip to AZ and back plus dusty conditions while
> there. The 7k miles
> since (over 16 months) were local.
>
> I don't know whether this is good or bad but I'm not going to 2nd guess
> GM as long as I am
> still under warranty. And selling one 1 change per year as opposed to 4 x
> per year can't be good for the dealer.
>
> David Lee Greenberg
> Port St Lucie, FL skype: david.lee.greenberg
> Dedicated to the Preservation of the Classic GMC Motorhome
> http://GMCmhRegistry.com
> http://www.picturetrail.com/gmcregistry
> ____________________________________________________________
> Software Testing Courses
> Earn Your Master Certificate in Software Testing - 100% Online
> http://thirdpartyoffers.juno.com/TGL3141/4c446821713a25c2d2m02duc
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] Moving oil filter [message #92621 is a reply to message #92553] |
Mon, 19 July 2010 21:31 |
jknezek
Messages: 1057
Registered: December 2007
Karma: 5
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Senior Member |
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Yep. I took my HHR in after the first 6K miles in 2006. The dash light said 65% remaining. The parts changer couldn't understand why idiots like me don't come in at 3K like the manual says. I told him they should fix the dash system so it actual means something. He told me it was people like me that kept him in business. I went to a different dealer after that. The dummy light on the dash is either a completely useless GM invention or the dealerships lie through their teeth to keep you coming in the door when it's not necessary. I suppose the lab work would let you know. Personally, I'm thinking the dash light is a crock, but if we can't make oil go longer than the same 3K it went 35 years ago, penzoil is spending a lot of R&D money for very little return. Especially knowing that engines are sealed a lot tighter than they ever used to be...
Thanks,
Jeremy Knezek
1976 Glenbrook
Birmingham, AL
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| Re: [GMCnet] Moving oil filter [message #92625 is a reply to message #92621] |
Mon, 19 July 2010 21:38 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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Those change oil lights are based on a computer mapping program that takes into account almost all of the operating parameters that the engine has encountered. I think if you google it, you'll find it is one of the most sophisticated algorithms around. Do you really think GM will tell you to change oil less than required when you have a 100k power train warranty? Besides, your wasting new oil and your dumping more oil into some waste facility unnecessarily. Even conservative consumer reports states that the 3000 mile oil change is one of the biggest marketing scams of all times.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Moving oil filter [message #92649 is a reply to message #92625] |
Tue, 20 July 2010 07:08 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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Bob,
LIke I said, that was break in oil. I have now established a data
base for this engine with Blackstone Labs and I'll post the trend with
the next change. You may be accurate in your reporting but perhaps
the delivery oil needs to come out long before the computer tells you
it has to.
On Mon, Jul 19, 2010 at 7:38 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> Those change oil lights are based on a computer mapping program that takes into account almost all of the operating parameters that the engine has encountered. I think if you google it, you'll find it is one of the most sophisticated algorithms around. Do you really think GM will tell you to change oil less than required when you have a 100k power train warranty? Besides, your wasting new oil and your dumping more oil into some waste facility unnecessarily. Even conservative consumer reports states that the 3000 mile oil change is one of the biggest marketing scams of all times.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] Moving oil filter [message #92668 is a reply to message #92625] |
Tue, 20 July 2010 10:51 |
idrob
Messages: 645
Registered: January 2005
Location: Central Idaho
Karma: 0
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| Bob de Kruyff wrote on Mon, 19 July 2010 19:38 |
Those change oil lights are based on a computer mapping program that takes into account almost all of the operating parameters that the engine has encountered. I think if you google it, you'll find it is one of the most sophisticated algorithms around. Do you really think GM will tell you to change oil less than required when you have a 100k power train warranty? Besides, your wasting new oil and your dumping more oil into some waste facility unnecessarily. Even conservative consumer reports states that the 3000 mile oil change is one of the biggest marketing scams of all times.
|
I was reading as test report from one of the auto mags (Road and Track or Car and Driver, don't remember) and they were long term testing a high dollar BMW. It had a computer oil change mapping system, and the first change light came on at something like 18,000 miles.
I have a friend who is a long haul trucker. His new truck (diesel of course) has an oil change interval in the 75,000 mile range. With 2500 trucks in their fleet, and many gallons of oil in each engine, no one wants to change the oil very often. I believe he told me that the engines are under warrantee (with that oil change interval) for half million miles. Memory is not perfect, but the numbers are much higher than most people expect.
Now the old dirty 455 and 403... change them a lot more often. (GMC content)
Rob Allen
former owner of '76 x-PB
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| Re: [GMCnet] Moving oil filter [message #92703 is a reply to message #92668] |
Tue, 20 July 2010 13:42 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""I have a friend who is a long haul trucker. His new truck (diesel of course) has an oil change interval in the 75,000 mile range. With 2500 trucks in their fleet, and many gallons of oil in each engine, no one wants to change the oil very often. I believe he told me that the engines are under warrantee (with that oil change interval) for half million miles. Memory is not perfect, but the numbers are much higher than most people expect.
""
Very soon we are going to see lifetime oil that never needs changing. It will be a huge thing for the environment if you're into that kind of thing. It is under test as we speak. True, there may be stuff in suspension, esp with a new engine, but that doesn't necessarily mean it needs to be changed.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Moving oil filter [message #92712 is a reply to message #92625] |
Tue, 20 July 2010 14:45 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I have had that oil change indicator on several GMC vehicles. The one on my Colorado went 10 K before it said to change. My last Colorado change only went 6200 miles. I assume this difference was because I was doing a lot of heavy towing of a 11,000 GVW trailer with a total loaded weight of around 9,000 pounds.
I can definitely say the algorithm changes of when the indicator turns on changes based on actually driving conditions.
I change oil based on time and miles. Usually I change at 6,000 miles or 6 months. I never make 6 months because I put on too many miles. I realize this is still more often than necessary. I use 5w30 for the cold months and 10w30 for the summer months. Even though I change it based on time and mileage, I still watch the oil change monitor. I think it is a good thing. I wish it was on all GM vehicles, especially my daughter's.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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