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Old 04-23-2011, 10:47 AM   #21
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To the post that said the GM was was 'special...that is pure BS...I hope you find a more reputable dealer!
Funny...when I bought my '07 Classic, (That's the '07 Silverado with the '06 body and the '07 running gear) there was almost no ULSD, I had to run the LSD for several months until the ULSD came out. Did not hurt a thing.
As to using additives...save your money. Our shop guy has spent big bucks reserching additives and can find no reason to use them. Period! (We put milions of miles on several hundred trucks every year.)
Jack
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Old 04-24-2011, 10:34 AM   #22
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Someone asked about the owner's manual, and I just went out and looked at mine today. My owner's manual says the oil life system is based on engine revolutions and temperature, not on mileage. It says to change the oil when the percentage nears zero or within a few hundred miles of the "change oil soon" warning. According to the manual, in some cases the oil life may go for a year before getting down to zero percent life left. However, it says not to go more than a year without an oil change, no matter what.
Hope that's right because we plan to keep this truck for a long time. Our old 2005 Silverado went almost 100k without ever being in the shop except for a couple of times getting the rotors turned, probably due to towing. It did not have the oil life system. So I'm hoping I can trust this thing.
Thanks to all for your input.
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Old 04-24-2011, 11:41 AM   #23
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You can never change your oil to much!! I am a auto tech and I change mine every 3-4000 miles on full synthetic. It cheaper to change your oil rather than pay for repairs. My truck usually has a camper or car trailer hooked to it. A little TLC never hurts. Oh and GM doesn't have " special " oil.
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Old 04-24-2011, 03:24 PM   #24
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Quote:
Originally Posted by mjones12 View Post
Our old 2005 Silverado went almost 100k without ever being in the shop except for a couple of times getting the rotors turned, It did not have the oil life system. So I'm hoping I can trust this thing.
Thanks to all for your input.


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Old 04-24-2011, 04:00 PM   #25
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I recently switched to AMSOIL full synthetic. When towing, AMOSOIL recommends changing your oil at every 15K miles or 1 Yr whichever comes first. Nearly a year with our truck now and not much over 8K miles so I will probably change it every 6-9 months to be safe. As previous posters have commented, you can't change it too often. However, at $60 a change your wallet might think it's too often.
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Old 04-24-2011, 08:26 PM   #26
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FYI- My GMC truck and Chevey work van reset the oil monitor the same way: turn the engine off, turn key to run position (do not start). Depress the gas peddle 5 times to the floor. Turn key off and restart. I reset the oil monitor myself after each oil change ensuring that it is reset and I don't get a notification a 1000 miles after an oil change. I do my 2000 GMC truck every 3000 miles. My work van gets done every 5000 to 6000 miles per our Reapair Authorization Center (work van has 285,000 miles on it).
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Old 04-24-2011, 09:48 PM   #27
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I wanted to go with synthetic oil when I got mine...however AMSOIL was the only 15W40 out there and I don't buy into their hype/crap, take your pick.
I have used the Shell Rotella T since day one, we use it in our trucks, in fact had several million milers using it in one fleet I was with.
I let the computer tell me when it's time, and I usually change it well before that.
For those that change it and get worried when it turns black after a short period...that's the nature of a diesel.
Jack
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Old 04-25-2011, 09:40 AM   #28
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This is why you should not rely on the monitor. If it was actually monitoring the condition of the oil, it would not need to be manually reset. It is monitoring your driving habits and mileage. It is not measuring the conditions of the oil itself. You should follow the appropriate maintenance schedule in your ownerís manual.
I understand how it works, my point being that if they do not reset it, in a fairly short amount of time I get the change oil message. I usually do my own oil changes but there has been a oil leak that they were having an issue repairing and they would have to drop the oil pan and would refill with fresh. I consider that an oil change as I would have them put a new filter on.
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Old 04-26-2011, 07:46 PM   #29
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Originally Posted by jackhartjr View Post
To the post that said the GM was was 'special...that is pure BS...I hope you find a more reputable dealer!
Funny...when I bought my '07 Classic, (That's the '07 Silverado with the '06 body and the '07 running gear) there was almost no ULSD, I had to run the LSD for several months until the ULSD came out. Did not hurt a thing.
As to using additives...save your money. Our shop guy has spent big bucks reserching additives and can find no reason to use them. Period! (We put milions of miles on several hundred trucks every year.)
Jack
My apology if the use of "spec" was misunderstood - I meant it as API Specification as opposed to special. The oil monitor is calibrated to the API specification for the motor ( I believe API SL or better for the OP) You can use the tool at dataStack if you would like to compare the grades against a number of factors.

As for diesel additives, I may only run my from new vehicles 500,000k and my current diesel only has 220,000 on it, my research tells me that the pennies per mile the additives I use are well worth the price for me.

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Old 04-26-2011, 08:36 PM   #30
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With my diesel, by the time I've got 5K on an oil change the oil is pretty black. I just can't stand to run it any longer than that. Besides, I only put around 7K or 8K a year on it. It sits in the garage unless it is towing, so most of it's duty is severe. .
Agreed, Mine is the same way, I have a 04 and it has 43k on it, dont drive it that much, i drive my Chevy tracker for day to day use
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