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Old Apr 18, 2012 | 03:13 PM
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Default oil changes ....

Question... can you go from fully synthic to non synthic for a few years and then go back to fully synthic oil? We all know we can not mix the two oils. Although will it hurt the motor going back to synthic? My car has 77k on it..
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Old Apr 18, 2012 | 03:25 PM
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Originally Posted by Ultimate_Respect
Question... can you go from fully synthic to non synthic for a few years and then go back to fully synthic oil? We all know we can not mix the two oils. Although will it hurt the motor going back to synthic? My car has 77k on it..
Sure, why not? And you can mix the two...many people 'brew' a few different types of oil for whatever reason. You can even buy a synthetic / non-synthetic blend right off the shelf. As long as it meets or exceeds the manufacturers recommendations it will be just fine.

Last edited by Jeff in Den; Apr 18, 2012 at 05:35 PM.
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Old Apr 18, 2012 | 03:37 PM
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What's the POINT?
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Old Apr 18, 2012 | 09:57 PM
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Curious why you would want to go with a non-synthetic in the car - the car was designed for synthetic oil.
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Old Apr 18, 2012 | 10:07 PM
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Originally Posted by Vetteman Jack
Curious why you would want to go with a non-synthetic in the car - the car was designed for synthetic oil.
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Old Apr 19, 2012 | 12:30 AM
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Why does the Corvette Ls1 need synthetic and the F body Ls1 does not??
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Old Apr 19, 2012 | 12:33 AM
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Originally Posted by retired cop
Why does the Corvette Ls1 need synthetic and the F body Ls1 does not??
not sure where you read that from..my brother owner manual on his 2002 Z28-- says use synthetic 5w30..
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Old Apr 19, 2012 | 12:40 AM
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i remember evil twin posted something here about it was because of the airflow and coolant system in the C5 was different so GM felt synth was necessary because of oil breakdown.
id like to see the page on the owners manual there where it specifically says sythn. normally they just give a standard like the GM 4718. It just so happens that the only oils that meet the standard are synth.

.... never mind found it. This is what the 2002 camaro actually says about synthetic oil. Ill attach a link to the manual so people can look it up for themself.
http://cs.chevroletclub.net/graphics...002camaro1.pdf

If you are in an area where the temperature falls
below -20F (-29C), consider using either
an SAE 5W-30 synthetic oil or an SAE 0W-30 oil.
Both will provide easier cold starting and better
protection for your engine at extremely
low temperatures.

For normal use all it is says is.

Engine oil with the American
Petroleum Institute Certified for
Gasoline Engines starburst symbol
of the proper viscosity.

Last edited by baxsom; Apr 19, 2012 at 12:47 AM.
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Old Apr 19, 2012 | 01:16 AM
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Ok thanks for the info, I had a 2002 Trans Am I did not recall the maunual saying to use synthetic oil.
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Old Apr 19, 2012 | 01:19 AM
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Just run Mobile 1 and be down with it.
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Old Apr 19, 2012 | 03:35 PM
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Somewhere in the C5 manual it also tells you to use an oil that meets GM4718M specifications. A non-synthetic oil won't meet that spec.
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Old Apr 19, 2012 | 07:01 PM
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Originally Posted by dougbfresh
What's the POINT?



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Old Apr 20, 2012 | 01:11 AM
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If you or the previous owners switched from the GM recommended 5W30 synthetic to a non-synthetic oil doesn't really matter. I would start using Mobil One 5W30 and move on to the next issue: what is the best filter?

I use Mobil One 5W30 oil and either Mobil One or Purolater filters

OBD
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Old Apr 20, 2012 | 06:44 AM
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The motor in the vette and any LS based Camaro, trans Am, TrailBlazer SS, Silverado SS etc have the same characterietics. GM says use Synthetic oil because its a corvette. Just like anything with the Corvette, stock motor parts are more expensive even tho they are the same as the camaro etc just because its a corvette.
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Old Apr 20, 2012 | 07:06 AM
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I don't understand why some members do not want to use the recommended synthetic oils? There is no good or practical reason to not run synthetic oil in your C5. If it's due to cost, then you should have bought something else. These cars require two things; synthetic oil and 93 octane gas to run at optimum power.

Actually, you can always find a namebrand synthetic oil on sale at Walmart. Just this weekend, I found Quaker State Synthetic for 26 bucks for 5 litres. They also had Pennzoil Platinum for the same price.
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Old Apr 20, 2012 | 09:47 AM
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Originally Posted by Cybermind
I don't understand why some members do not want to use the recommended synthetic oils? There is no good or practical reason to not run synthetic oil in your C5. If it's due to cost, then you should have bought something else. These cars require two things; synthetic oil and 93 octane gas to run at optimum power.

Actually, you can always find a namebrand synthetic oil on sale at Walmart. Just this weekend, I found Quaker State Synthetic for 26 bucks for 5 litres. They also had Pennzoil Platinum for the same price.


Cause they are like little baby chicks---------------CHEAP CHEAP, If Lamborghini's and Ferrari's came down in price like the C5, it would be the same.
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