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Old Jan 28, 2011 | 03:28 PM
  #1  
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Default Oil Question

Hello. I have a 2000 C5, 6 speed that I bought last year with 2,600
miles on it. The oil had been changed just before I bought it. The
previous owner had not used synthetic in it. It now has 4,000 miles on
it and I'm going to change the oil for the first time since I've owned
it. Is it OK - or for that matter is it better - for me to put synthetic
in it and keep it at synthetic from here out? If so, is there a recommended synthetic? Thanks very much in
advance for a reply.
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Old Jan 28, 2011 | 03:35 PM
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Originally Posted by mustanger
Hello. I have a 2000 C5, 6 speed that I bought last year with 2,600
miles on it. The oil had been changed just before I bought it. The
previous owner had not used synthetic in it. It now has 4,000 miles on
it and I'm going to change the oil for the first time since I've owned
it. Is it OK - or for that matter is it better - for me to put synthetic
in it and keep it at synthetic from here out? If so, is there a recommended synthetic? Thanks very much in
advance for a reply.
From your owners manual:

Part D: Recommended Fluids
and Lubricants


NOTE: Fluids and lubricants identified below by name,
part number or specification may be obtained from
your dealer.
USAGE FLUID/LUBRICANT
Engine Oil The engine requires a special
Engine Oil meeting GM Standard
GM4718M. Oils meeting this
Standard may be identified as
synthetic, and should also be
identified with the American
Petroleum Institute Certified
For Gasoline Engines starburst
symbol. However, not all
Synthetic API oils with the
Starburst symbol will meet this
GM Standard. You should look
for and use only an oil that meets
GM Standard GM4718M. For the
proper viscosity, see “Engine Oil”
in the Index.


http://www.gmpartshouse.com/download...00corvette.pdf
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Old Jan 28, 2011 | 03:59 PM
  #3  
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I guess this is a serious question, but it has been asked so many times before.

My advice is to look at the oil filler cap, then in the owners manual, then get over it and use whatever makes you feel good.
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Old Jan 28, 2011 | 04:20 PM
  #4  
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Why would the previous owner not have used synthetic oil as required by the GM4718M designation? It doesn't make sense especially for a garage queen with low mileage.
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Old Jan 28, 2011 | 05:45 PM
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I would not worry about it at all and just start using synthetic oil now. The same basic LS1 was used in the 98-02 Camaro/ Firebird and the factory did not recomend synthetic.
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Old Jan 28, 2011 | 06:35 PM
  #6  
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Yes I would put synthetic in it like the manual says. Good thing the car is in your hands now because the privious owner was either cheap or ignorant!

Last edited by jrose7004; Jan 28, 2011 at 08:20 PM.
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Old Jan 28, 2011 | 06:39 PM
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If you don't use synthetic oil your engine will blow up!!!!!!



Isn't "thou shall use synthetic oil" one of the commandments?
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Old Jan 28, 2011 | 07:02 PM
  #8  
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Every thing I own and for the past 20 years this year has synthetic oil. I have had 3 vehciles exceed 250k and never a wrench inside the motor and they all sounded show room when the left. I talking weed wacker, lawn mower, kubota compact tractor, my vette my 95 buick everyday work car, a 1998 gmc 1/2 ton & my wifes 06 Impala. Because i have never seen any 2 cycle made by Sthil for Sthil my chain saw has not. Its only a matter of time.
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Old Jan 28, 2011 | 09:26 PM
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Just make the switch, you will still reap the benefits of Synthetic Oil.

Good Luck
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Old Jan 28, 2011 | 11:44 PM
  #10  
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I had 100+ k on my camaro before I started putting synthetic in it, it seems to like it better too.
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Old Jan 29, 2011 | 01:44 AM
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Originally Posted by manley845
If you don't use synthetic oil your engine will blow up!!!!!!



Isn't "thou shall use synthetic oil" one of the commandments?





Thou shall use Mobil1. Period!


Anything else would be


Bam!
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Old Jan 29, 2011 | 08:20 AM
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Originally Posted by Cybermind
Why would the previous owner not have used synthetic oil as required by the GM4718M designation? It doesn't make sense especially for a garage queen with low mileage.
Possibly because he drove it so little, yet changed the oil on some sort of schedule, that he couldn't justify the 2-3x cost of synthetic oil??
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