Oil Additive....

As Murray already said, the anecdotal evidence doesn't prove anything. That's like saying I have sprinkled holy water on all my cars for the past 30 yrs and they all purr like kittens!

I think a few of us are just trying to save you a few bucks but if it makes you feel better to dump something in your oil (against the advice of GM engineers and without any evidence that it helps) pls carry on 😂
 
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In the old days, I used to use a product called Slick 50 to help with reducing engine wear as the product was supposed to bond to the metal components in the engine and reduce metal on metal wear upon start up. After the engines sit they start dry with metal on metal for a couple of seconds until the oil reaches the top of the engine.
In 1992, Mobil 1 became the factory fill oil for every Corvette made. The use of 5W-30 synthetic continued for almost 3 decades until they changed to 0W-40 in the C8.
I stopped using additives in my cars once synthetic oils became available. Synthetic oil flows better and offers better protection especially in cold temperatures. It eliminated the need to use the additives. During the time I used the additives in my Camaro and older Corvettes I didn't have an engine failure. I may have gotten a bit better gas milage but I was always on it, and not overly concerned about my mpg.
Using an additive or even an oil catch can, gives GM an out if you suffer a warranty situation. If you blow up your engine your oil will be analyzed. As Mobil 1 used to market itself with zero engine wear on a micrometer after more than 100,000 miles, you are taking a chance by putting something in your engine other than the factory fill. If you still feel the need to use an additive, I would highly recommend you wait until your powertrain warranty has expired.
 
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Mr.Corvette said:
In the old days, I used to use a product called Slick 50 to help with reducing engine wear as the product was supposed to bond to the metal components in the engine and reduce metal on metal wear upon start up. After the engines sit they start dry with metal on metal for a couple of seconds until the oil reaches the top of the engine.
In 1992, Mobil 1 became the factory fill oil for every Corvette made. The use of 5W-30 synthetic continued for almost 3 decades until they changed to 0W-40 in the C8.
I stopped using additives in my cars once synthetic oils became available. Synthetic oil flows better and offers better protection especially in cold temperatures. It eliminated the need to use the additives. During the time I used the additives in my Camaro and older Corvettes I didn't have an engine failure. I may have gotten a bit better gas milage but I was always on it, and not overly concerned about my mpg.
Using an additive or even an oil catch can, gives GM an out if you suffer a warranty situation. If you blow up your engine your oil will be analyzed. As Mobil 1 used to market itself with zero engine wear on a micrometer after more than 100,000 miles, you are taking a chance by putting something in your engine other than the factory fill. If you still feel the need to use and additive, I would highly recommend you wait until your powertrain warranty has expired.
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It contained PTFE . I remember the stuff.
en.wikipedia.org

Polytetrafluoroethylene - Wikipedia

en.wikipedia.org en.wikipedia.org
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Mr.Corvette said:
It was recommended for using with regular or semi-synthetic motor oils, but when I started using the fully synthetic motor oils, I felt it was redundant
and no longer necessary.
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Absolutely. Not necessary now. They claimed at the time that it would bond to the metal. Very actively marketed. Did it work? Who knows, maybe yes maybe no but I believe it still being added to lubricants, maybe even WD 40 . Can’t recall.
 
Mr.Corvette said:
In the old days, I used to use a product called Slick 50 to help with reducing engine wear as the product was supposed to bond to the metal components in the engine and reduce metal on metal wear upon start up. After the engines sit they start dry with metal on metal for a couple of seconds until the oil reaches the top of the engine.
In 1992, Mobil 1 became the factory fill oil for every Corvette made. The use of 5W-30 synthetic continued for almost 3 decades until they changed to 0W-40 in the C8.
I stopped using additives in my cars once synthetic oils became available. Synthetic oil flows better and offers better protection especially in cold temperatures. It eliminated the need to use the additives. During the time I used the additives in my Camaro and older Corvettes I didn't have an engine failure. I may have gotten a bit better gas milage but I was always on it, and not overly concerned about my mpg.
Using an additive or even an oil catch can, gives GM an out if you suffer a warranty situation. If you blow up your engine your oil will be analyzed. As Mobil 1 used to market itself with zero engine wear on a micrometer after more than 100,000 miles, you are taking a chance by putting something in your engine other than the factory fill. If you still feel the need to use and additive, I would highly recommend you wait until your powertrain warranty has expired.
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Slick 50 took out a 396 on a ‘67 Ford XLS that I owned. 48 hours after putting it in, as per the instructions, we started blowing blue smoke like a coal powered locomotive. Never again….
 
Cariboocreek said:
Slick 50 took out a 396 on a ‘67 Ford XLS that I owned. 48 hours after putting it in, as per the instructions, we started blowing blue smoke like a coal powered locomotive. Never again….
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Did the Ford XLS say to the Chevy 396 “ do you come here often “ ? Just curious.
 
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Searching the internet, I can't find any actual evidence that Moly actually bonds to metal parts, which would be necessary to provide any actual benefit. Lot's of articles from companies that make or sell it, and lots of anecdotal claims from owners, but no actual cases where someone used it and then disassembled an engine to see if it did anything.

Moly can damage oxygen sensors and cats in older engines where the rings are worn and there's blowby in the combustion chamber, but that's probably not an issue in a C8. It's a particulate, so I wonder if it's being trapped by the oil filter. If so, it could potentially clog the filter and result in the bypass valve opening allowing unfiltered oil to flow through the engine.

50 years ago additives might have actually been useful. Modern oils are so much better, and modern engines built to much better tolerances that I doubt there's any real benefit. Unless you're planning to run your LT2 for 1,000,000 miles, you're not going to wear out the engine anyway. Moly is cheap. If it really provided a benefit with no negatives, you don't think oil companies would include it in their products?

You could always just disable the ignition (I'm sure there's a fuse that could be pulled) and let it crank 5-10 seconds to build oil pressure before firing. Personally I wouldn't put oil additives in my new, warrantied C8 (and who's to say they'll do a better job in this scenario anyway). And I also wouldn't worry about a once-a-year event. People have been winter storing cars forever and you never hear of any issues related to "dry" starts.
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My C8 already seems to crank the engine longer before it activates the ignition when it's cold out.
 

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