Additives in our engine oil
Elder User
Joined: Mar 2003
Posts: 699
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From: northern Michigan
Motor oil manufacturers select the additive package based upon the oil base and what SAE spec they are making the oil to meet. Not all additives are compatiable with each other or some oil bases. Some additives like The teflon based ones can destroy an engine if it overheats as it turns the teflon into an acid that attacks bearings and gaskets. Others like dow cornings type M are mineral based(molybendumdisulfide) and are not compaiable with soft metals like those used in bushings and babitted bearings but work great on steel bearings like roller bearings or ball bearings. I would be very careful adding something to an engine oil without knowing what the downside could be and some of these outfits that market this stuff I wouldn't expect would stand behind it if an engine failure occured.
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Fleet Mechanic
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From: Seattle
I give you the Green Monster - Topic Powered by Social Strata
Post Fiend
Joined: Feb 2008
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From: Lancaster, Pa.
Wow Alvin, got pretty hostile there for a bit. The guy knows his stuff 
. I don't think the fella is going to listen to reason, its a shame that nice truck is going to pay the price, o well, you tried..
. I don't think the fella is going to listen to reason, its a shame that nice truck is going to pay the price, o well, you tried..
Elder User
Joined: Mar 2006
Posts: 751
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From: Greeneville,TN
Motor oil manufacturers select the additive package based upon the oil base and what SAE spec they are making the oil to meet. Not all additives are compatiable with each other or some oil bases. Some additives like The teflon based ones can destroy an engine if it overheats as it turns the teflon into an acid that attacks bearings and gaskets. Others like dow cornings type M are mineral based(molybendumdisulfide) and are not compaiable with soft metals like those used in bushings and babitted bearings but work great on steel bearings like roller bearings or ball bearings. I would be very careful adding something to an engine oil without knowing what the downside could be and some of these outfits that market this stuff I wouldn't expect would stand behind it if an engine failure occured.
Mineral Based = Molybdenum disulfide. You need to check you info on that one. Molybdenum is compatible with most every type of bearings. When moly was first used as an additive in the early 70's the type and concentration was over 2000ppm. It is very corrosive at that level. This is not the same as what is being used today.
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Post Fiend
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Last edited by big poppa; Dec 16, 2009 at 09:09 PM. Reason: Edited
Cargo Master
Joined: Aug 2009
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From: Glendive, MT
Sometimes an additive comes along that does what it claims to do, Diesel Kleen for example. Motorsilk mentioned a 4-ball wear test but nowhere do they say what the results were. I would bet that is because the average synthetic oil would out perform it by a lot. They do show the pin on disc test results but I can't think of how that test might simulate conditions in an engine. I have never seen anyone else use that test method, but then I'm just a truck driver.
After reading all their test results and claims all I can say is Snakeoil.
After reading all their test results and claims all I can say is Snakeoil.
Elder User
Joined: Mar 2003
Posts: 699
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From: northern Michigan
Mineral Based = Molybdenum disulfide. You need to check you info on that one. Molybdenum is compatible with most every type of bearings. When moly was first used as an additive in the early 70's the type and concentration was over 2000ppm. It is very corrosive at that level. This is not the same as what is being used today.
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