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Old Apr 11, 2011 | 09:03 AM
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Default Oil change question
I am a C1& C2 person. I bought my 99,a little over a year ago. Time for an oil change, says to use Mobil 1 5w30... Can I use 10w40 syntec????


Sorry,I meant 5w40 Syntec
Last edited by prestige6; Apr 11, 2011 at 09:37 AM.
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Old Apr 11, 2011 | 09:22 AM
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I'd use what the manual says then there's no question.
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Old Apr 11, 2011 | 09:23 AM
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Originally Posted by jrose7004
I'd use what the manual says then there's no question.
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Old Apr 11, 2011 | 09:24 AM
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The car and the manual states 5W-30 why change? The internals have smaller clearances. 5W-30 or 0W-30.............Or you can do a search and check what come up....................
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Old Apr 11, 2011 | 09:26 AM
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Originally Posted by Jewjenk
The car and the manual states 5W-30 why change? The internals have smaller clearances. 5W-30 or 0W-30.............Or you can do a search and check what come up....................
Oh and-------
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Old Apr 11, 2011 | 09:28 AM
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Plenty of others do. Just make sure the oil complies with GM 4718M and Castrol Syntec does. I prefer to stick to the recommended oil but thats just me.

BTW I still have oily hands from changing my oil
Last edited by DeeGee; Apr 11, 2011 at 09:31 AM.
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Old Apr 11, 2011 | 09:53 AM
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I am a C1& C2 person. I bought my 99,a little over a year ago. Time for an oil change, says to use Mobil 1 5w30... Can I use 10w40 syntec????


Sorry,I meant 5w40 Syntec.....
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Old Apr 11, 2011 | 10:21 AM
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Old Apr 11, 2011 | 12:26 PM
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remember the manual doesnt say you have to use mobil1, it just recommends it.
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Old Apr 11, 2011 | 01:13 PM
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Originally Posted by baxsom
remember the manual doesnt say you have to use mobil1, it just recommends it.
The following Major Brands meet GM 4718M

Any oil that meets this spec is fine for your Vette..
Formula Shell fully Synthetic
Pennzoil Platinum
Quaker State HorsePower
Castrol Syntec
Mobil 1

There are probably more
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Old Apr 11, 2011 | 02:20 PM
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You can use any fully synthetic oil with the specified range. I have always used what it says on the oil fill cap: Mobil 1, 5W 30.
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