Originally Posted By: Trav
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Some engine manufaturers do sell own label fuel additives, but as far as I am aware none sell oil additives or endorse their use because no one has found one that worked so far.
GM had a full line line of additives like GM Part No. 992869 for their current ACDelco supplied EOS which was Part#12345501 previously.
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a multi-purpose additive concentrate designed to help eliminate lifter sticking, reduce valve train noise, reduce camshaft lobe scuffing, and reduce break-in wear. The use will maintain the additive levels in oil to promote designed-in oil detergency, disperancy and wear protection, especially under severe service conditions such as high load and high operating temperatures.
Over the years companies have looked to the aftermarket to chemical solutions to resolve issues that otherwise cost them a fortune in recalls. A couple of good examples would be..
Subaru using Holt's leak sealer for preventing 2.5 head gasket leaks and Saab with lubeguard red for transmission troubles.
Many companies at one time or another either recommended or supplied themselves an engine oil supplement, cooling system stop leaks, transmission supplements, etc for a verity of reasons.
Basically i am against the wholesale use of additives for no other reason than the feel good factor but if there are specific issues many times there are some products that work very well.
Just because an engine has 75K on the clock doesn't make it an automatic candidate for something like Restore or seal conditioners but it may benefit from something to clean minor varnish and piston ring deposits before they become a problem.
Agreed! Isn't it funny when a car mfg screws up they recommend an additive, or even shortening the published OCI? My point is if engineers designed the perfect engine, and oil companies had the perfect gas and oil, why do the car makers sometimes contradict themselves and recommend an additive, or change to their main't program? Sometimes they learn as they go, or the public does the final testing of their product. Many times the additive they recommend to bail them out saves them big $$$ in warranty repairs.