Effects of Motor Oil Composition on Engine Wear

Waddey, Walter E.; Pearce, Adam

doi:10.4271/690774

Cited by 12 publications

References 9 publications

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Additive Interactions and Their Effect on the Performance of a Zinc Dialkyl Dithiophosphate

Rounds

1978

A S L E Transactions

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General Motors CorporationWarren, Michigan 48090Four-ball zuenr sttidies have demowstmted tlznt ttie m~tituear perfornlance of n cornmercinl zinc dinlkyl dithiophosphnte (ZDP) nntiruenr rigen1 can be ridvcrsely affected by tire presc~ice of some friction niodfiers, E P rigents, osidr~tion intiibito~s, nnd detergentdisperstn~ts. T o csplrin these obseruntions, ZDP decomf)osition stt~dies 7ue1.e co?zd~~cted tuitl~ these other nddi1ive.s present. None of tile rt~ensrrred ZDP decomposition characteristics comi)letely explnin &he obse~vcd clinnges in ZDP a,~tituenr peformnrlce. Complex,formntion in the 61ilk oil and competition for tlie stcrf(~ce serrn to be i~~uoIued.

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Additive Interactions and Their Effect on the Performance of a Zinc Dialkyl Dithiophosphate

Rounds

1978

A S L E Transactions

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Some Effects of Amines on Zinc Dialkyldithiophosphate Antiwear Performance as Measured in 4-Ball Wear Tests

Rounds¹

1981

A S L E Transactions

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A&~cr.se itrtercrctiots 1.f zinc dialk~lditl~iopl~ospIrnle (ZDPs) wi/h ollrer rcclirired rrddi~iues it2 crtz engine oil 1s otle f(rc/or cof~lributing lo //LC I~iglr phosp1~orrr.s cotrtenl of sottre e7tgine oils. Si?~ccphos/)hortrs poisolrs eslrrirr.sl gcrs e~trission c~/alysts, rucrys lo redztce the nclvcne irrtercrctiotr.~ crre 6eiti.g sclzrgl~l. The ZDP-amitre i,tz/erc~ctio?~ wtrs i?tvestigctled cis a ttroclel uf sztcl~ ntz interclctiotr. Above n criticnl coi~cer~frcrliot~. (11t11~ties c(rti C ( I I L C C~ /he attliruerrr pet$)r~trntzce of ZDPs ( I S ~trec~~ir red irl cr 4-ball ~tlnchine. At cr ttritle cot~cerrtrc~liotu beloru //re crilica/ vcrlire, (1 syt~ergisl~c nrltizue(rr ejjfect wns oLrsetvec1 ( I / Irigl~er locr(ls. T l~e tolercr?rce of cli/feren/ ZDPs lo /Ire presetzce of nttrittes rucrs tl~e snttre cis /he rcirtkitig of /Ire ZDPs it1 ter~trs of n,rtiruero. perforttrcocce. /I ttreclrn7risrtr for /lie crti.liruecrr nclio?~ of ZDPs itrvolvitrg tlre forit~nlio~i of nlz acid phos/)hnte decortrposi/iotr proditct h(rs bretr pro/)osecl.

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The Use of Simulant Devices to Evaluate the Wear Performance of Multigraded Engine Oils

Goldblatt¹

1977

The Relationship Between Engine Oil Viscosity and Engine Performance

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Conditions for the laboratory simulation of engine ring and cam-and-tappet wear performance have been established. By using these test conditions, the wear performance of twelve oils of known viscometric properties has been determined. The results suggest that viscosity under either high or low shear conditions is not related to the wear performance under these thin film simulated engine conditions. Wear performance for these oils does appear to be related to the degree of polymer degradation experienced under the conditions of thin film or elastohydrodynamic lubrication.

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Effects of Motor Oil Composition on Engine Wear

Cited by 12 publications

References 9 publications

Additive Interactions and Their Effect on the Performance of a Zinc Dialkyl Dithiophosphate

Additive Interactions and Their Effect on the Performance of a Zinc Dialkyl Dithiophosphate

Some Effects of Amines on Zinc Dialkyldithiophosphate Antiwear Performance as Measured in 4-Ball Wear Tests

The Use of Simulant Devices to Evaluate the Wear Performance of Multigraded Engine Oils

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