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Change to Synthetic Oil

boomer123

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boomer123 Enthusiast

boomer123

Posted
Posted

I am considering changing to synthetic motor oil on my 6.0 Denali with 55000 miles. I have read where it is not recommended to change to synthetic motor oil on motors with over 50K. Does anyone have an opinion?? The oil has been changed every 3K since new.

 

I would appreciate any input.

 

Thanks.

Tree_Hugger Enthusiast

Tree_Hugger

Posted
Posted
I am considering changing to synthetic motor oil on my 6.0 Denali with 55000 miles.  I have read where it is not recommended to change to synthetic motor oil on motors with over 50K.  Does anyone have an opinion??  The oil has been changed every 3K since new. 

 

I would appreciate any input.

 

Thanks.

 

 

 

 

What you read is totally bogus.

So is changing oil every 3,000 miles.

Does your Denali not have the Oil Life Monitor?

Even without it, 5,000 mile Oil Change Intervals are a safe bet.

TonyMazz Enthusiast

TonyMazz

Posted
Posted

Crud ? :cheers: what crud ?

 

If he is running a standard GF-4 SL or SM oil his motor will be clean...

 

The motor will do just fine with standard dino oil...no need to incure the added expense....If you change your dino oil every 5 k you will do just fine...

 

If it makes you feel any better send a sample into black stone labs...have the run the TBN test at say 3K and you will fine your oil has reached about 30% depletion of the additive package...meaning you are simply dumping money down the drain.

 

Your OLM is a good tool and you should use it...

 

If you insist on spending money....spend it on a good filter and stay away from the cheap FRAM filters.... :banghead:

ken1mod Senior Enthusiast

ken1mod

Posted
Posted
Crud ?  :cheers:  what crud ?

 

If he is running a standard GF-4 SL or SM oil his motor will be clean...

 

The motor will do just fine with standard dino oil...no need to incure the added expense....If you change your dino oil every 5 k you will do just fine...

 

If it makes you feel any better send a sample into black stone labs...have the run the TBN test at say 3K and you will fine your oil has reached about 30% depletion of the additive package...meaning you are simply  dumping money down the drain.

 

Your OLM is a good tool and you should use it...

 

If you insist on spending money....spend it on a good filter and stay away from the cheap FRAM filters.... :banghead:

 

 

 

 

 

Put whatever oil in it you want, whenever you want. there are so many urban legends out there about oils, its scary. I managed a fleet of trucks and used 30 dino oil and had awesome engine life and no problems. engines routinely went over 200k and when taken apart for work usually caused by driver error, crosshatch pattern was still visible on cylinders. I would not use fram filters though, even though I used to. You will find no benefit to synthetic other than the value of your xom stock.

 

ken

fyarbrou Enthusiast

fyarbrou

Posted
Posted

With 55K miles you SHOULD still be ok to switch to synthetic oil. I do know for an ABSOLUTE FACT that switching to synthetic oil on a higher mileage vehicle (~80K+) will result in leaking valve cover gaskets. I have personally done this on 2 vehicles and know of many more.

trever1t Enthusiast

trever1t

Posted
Posted

First of all, the use Synthetics remove some demand for crude oil, most of which is from the Middle East. Using less Dino oils when possible puts tiny dent in their sales.

Synthetic oils also maintain viscocity better than Dino oils, and make start-up less damaging to engine.

I run my motor hard, a lot. I use Mobil 1 and i change every 3-4K miles. I feel better for it even if it's only a minor difference from a quality Dino. I also run synthetics in my rear differential, transfer and tranny.

To me it's like running premium fuel tuning, the difference is only pennies so why not?

boomer123 Enthusiast

boomer123

Posted
  • Author
Posted

Thanks for the great replies. Good information. My OLM shows 50% oil life left around 3000 miles. I never knew how reliable this tool was. I always thought if you changed oil more often rather than less, it could'nt hurt.

 

Thanks for the information.

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
Crud ?  :cheers:  what crud ?

 

If he is running a standard GF-4 SL or SM oil his motor will be clean...

 

The motor will do just fine with standard dino oil...no need to incure the added expense....If you change your dino oil every 5 k you will do just fine...

 

If it makes you feel any better send a sample into black stone labs...have the run the TBN test at say 3K and you will fine your oil has reached about 30% depletion of the additive package...meaning you are simply  dumping money down the drain.

 

Your OLM is a good tool and you should use it...

 

If you insist on spending money....spend it on a good filter and stay away from the cheap FRAM filters.... :banghead:

 

 

 

 

 

I guess when you never opened one up after 20K you can say that. Dino oil will leave deposits, period. M1 doesn't coke up like regular oil. Believe whatever suits you as I don't care. Been there done that. :banghead:

TonyMazz Enthusiast

TonyMazz

Posted
Posted

So you are saying that Dino oil "cokes up" and that's why you switched to synthetic ? Would you explain what dino oils "coke up", under what conditions and temperatures ?

 

People get the wrong impression with generalizations.....

 

..and yes I have torn down many-a- motor under varying conditions, and have had motors with 200K that have not had any "coke up"...and ran dino it's whole life....GF-3 and now the GF-4 oils were just fine.

 

...and by "coke up" is that oxidation, nitrification, ..sludge or exactly what are you talking about....

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
So you are saying that Dino oil "cokes up" and that's why you switched to synthetic ?  Would you explain what dino oils "coke up", under what conditions and temperatures ?

 

Gee If I new EXACTLY when I would tell you. But since I DON'T live inside my 350 can't tell you. I didn't buy it new and it had a good number of miles on when I changed the intake gasket. Then a year of running on syn I pulled the heads due to an oil leak. 85% cleaner inside. Cleaned the scum off of it that those dead dinos left.

 

People get the wrong impression with generalizations.....

 

And you throw yours as well. I'm not going to debate this crap on dino vs sythetic. I use what works for me. Your attempt to bait me to do so was lame at best. :cheers:

TonyMazz Enthusiast

TonyMazz

Posted
Posted

"Your attempt to bait me to do so was lame at best" :D haha

 

Boomer123: Just be aware that the molecular structure of a full synthetic has mostly the same size molecules and that the additive packages ( the ones that cause your seals to swell) are a bit different than conventional oil.

 

Some folks complain of oil leaks because any gunk there IS in the engine can be removed off of the seals....that sounds like a good thing, but in some cases the seals will leak.

 

That said, there is no reason not to switch but you might consider doing a slow clean process rather than just dump synthetic oil in.

 

First visit the http://www.auto-rx.com/ site to do some reading. They have a product that will spotlessly clean your engine gradually. Unlike some folks who think they should clean drastically all at once promotes possibilities of gumming up oil galley's hence cause significant bearing wear....etc. This product does not do that and it takes some time....but it's gradual...so do some reading.

 

BTW I don't sell thie autoRX product but have used it on an older 180,000 mile blazer 4.3L and it came out spotless and ran as quiet as it did when new.....

 

Anyway....don't use those cheap quickie engine flushes and don't just dump synthetic oil in there in hopes of just cleaning it out...it will do that, but you want to keep the particulate matter small enough to swim in the oil and be picked up by the filter....not plug things up and have a momentary dry / or reduced oil flow during operation.

 

This is just a suggestion and you can take or discard this information. :cheers:

100R1 Enthusiast

100R1

Posted
Posted

It's great to ask questions and read to find, understand about these things.

 

Here are a few Links to answer anf form your opinions and put into practice what you want.

 

Bob is the oil Guy

 

Have your oil tested to find the best oil and change interval for your vehicle and driving conditions Blackstone oil labs

 

Here is a study on Synthetic oil life OIl Study

 

And if you want to know about oil filters oil filter study

 

Times change, technology changes and lubricants change. Maybe Opinions will change also.

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
It's great to ask questions and read to find, understand about these things.

 

Here are a few Links to answer anf form your opinions and put into practice what you want.

 

Bob is the oil Guy

 

Have your oil tested to find the best oil and change interval for your vehicle and driving conditions  Blackstone oil labs

 

Here is a study on Synthetic oil life OIl Study

 

And if you want to know about oil filters  oil filter study

 

Times change, technology changes and lubricants change. Maybe Opinions will change also.

 

 

 

 

Fairly decent site but I think it is biased for that Schaeffers stuff so take what is there and make up your own mind. Yes everything changes but opinions probably never will. :cheers:

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