{"id":100145,"date":"2026-02-15T20:20:56","date_gmt":"2026-02-15T20:20:56","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100145"},"modified":"2026-07-12T17:31:50","modified_gmt":"2026-07-12T17:31:50","slug":"lubricant-compatibility-checker","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/lubricant-compatibility-checker\/","title":{"rendered":"Grease Compatibility Evidence Worksheet"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Evidence-based Grease Compatibility Decision Worksheet\",\"description\":\"Classify exact-pair grease compatibility evidence without predicting compatibility from thickener or base-oil families.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/lubricant-compatibility-checker\/\",\"applicationCategory\":\"Engineering Reference\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"dateModified\":\"2026-07-12\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n<style>:root{--gc:#315f88;--gcl:#eaf2f9;--ink:#181817;--sec:#595750;--mut:#817e76;--b:#d8d4cc;--bl:#e9e5dd;--alt:#f8f6f1;--red:#b42318;--redl:#fff0ee;--amb:#8a6500;--ambl:#fff8df;--green:#16734a;--greenl:#eaf7f0;--font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}.gc-wrap{font-family:var(--font);color:var(--ink);max-width:1040px;margin:0 auto;background:#fff;border:1px solid var(--bl);border-radius:16px;overflow:hidden}.gc-hero{padding:34px 38px 26px;background:linear-gradient(135deg,#f7fafc,#edf4fa)}.gc-kicker{text-transform:uppercase;letter-spacing:.1em;font-size:12px;font-weight:800;color:var(--gc)}.gc-hero h1{font-size:clamp(28px,4vw,44px);line-height:1.08;margin:8px 0 12px}.gc-lead{font-size:17px;line-height:1.65;color:var(--sec);max-width:850px}.gc-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.gc-badge{padding:6px 10px;border-radius:99px;background:#fff;border:1px solid var(--b);font-size:12px;font-weight:700}.gc-main{padding:30px 38px}.gc-panel{border:1px solid var(--b);border-radius:14px;padding:24px;margin-bottom:22px}.gc-panel h2{font-size:22px;margin:0 0 8px}.gc-note{color:var(--sec);font-size:14px;line-height:1.55}.gc-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.gc-field{display:flex;flex-direction:column;gap:7px}.gc-wide{grid-column:1\/-1}.gc-label{font-size:13px;font-weight:800}.gc-help{font-size:12px;color:var(--mut);line-height:1.4}.gc-input,.gc-select,.gc-textarea{font:inherit;border:1px solid #bcb8af;border-radius:9px;padding:11px 12px;background:#fff;color:var(--ink);width:100%;box-sizing:border-box}.gc-textarea{min-height:92px;resize:vertical}.gc-input:focus,.gc-select:focus,.gc-textarea:focus{outline:3px solid rgba(49,95,136,.17);border-color:var(--gc)}.gc-error{min-height:22px;margin:14px 0 0;color:var(--red);font-weight:800;font-size:14px}.gc-results{margin-top:20px;border-radius:12px;border:1px solid var(--b);overflow:hidden}.gc-results[hidden]{display:none}.gc-rhead{padding:18px 20px}.gc-rhead.pass{background:var(--greenl);color:var(--green)}.gc-rhead.fail{background:var(--redl);color:var(--red)}.gc-rhead.warn{background:var(--ambl);color:var(--amb)}.gc-rhead.info{background:var(--gcl);color:var(--gc)}.gc-rtitle{font-weight:900;font-size:21px}.gc-pair{font-size:13px;margin-top:5px;overflow-wrap:anywhere}.gc-rgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--bl)}.gc-card{background:#fff;padding:18px}.gc-card h3{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--mut);margin:0 0 8px}.gc-card p{margin:0;font-size:14px;line-height:1.55}.gc-alert{border-left:4px solid var(--amb);background:var(--ambl);padding:14px 16px;margin-top:18px;font-size:14px;line-height:1.55}.gc-section{border-top:1px solid var(--bl);padding:28px 38px}.gc-section h2{font-size:24px;margin:0 0 10px}.gc-section h3{font-size:18px;margin:22px 0 8px}.gc-section p,.gc-section li{font-size:14px;line-height:1.65;color:var(--sec)}.gc-table-wrap{overflow-x:auto;border:1px solid var(--b);border-radius:10px}.gc-table{border-collapse:collapse;width:100%;min-width:680px}.gc-table th,.gc-table td{padding:12px 13px;border-bottom:1px solid var(--bl);text-align:left;vertical-align:top;font-size:13px;line-height:1.45}.gc-table th{background:var(--alt);font-weight:900}.gc-table tr:last-child td{border-bottom:0}.gc-code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.gc-footer{padding:20px 38px;background:var(--alt);font-size:12px;color:var(--mut)}.gc-footer a,.gc-section a{color:var(--gc)}@media(max-width:700px){.gc-hero,.gc-main,.gc-section{padding-left:20px;padding-right:20px}.gc-grid,.gc-rgrid{grid-template-columns:1fr}.gc-wide{grid-column:auto}.gc-panel{padding:18px}.gc-table{min-width:620px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}<\/style>\n<div class=\"gc-wrap\"><header class=\"gc-hero\"><div class=\"gc-kicker\">Exact products \u00b7 evidence first<\/div><h1>Grease Compatibility Evidence Worksheet<\/h1><p class=\"gc-lead\">Classify the evidence for one exact pair of lubricating greases. This worksheet does not predict compatibility from thickener names, base-oil families, NLGI grade or a generic matrix. It does not authorize mixing or prescribe a universal changeover procedure.<\/p><div class=\"gc-badges\"><span class=\"gc-badge\">ASTM D6185-24 scope<\/span><span class=\"gc-badge\">No composition prediction<\/span><span class=\"gc-badge\">No automatic purge quantity<\/span><span class=\"gc-badge\">OEM procedure controls<\/span><\/div><\/header>\n<main class=\"gc-main\"><section class=\"gc-panel\"><h2>Document the exact pair and evidence<\/h2><p class=\"gc-note\">Use full manufacturer and product designations, including formulation\/revision where available. A family name such as \u201clithium\u201d, \u201cpolyurea\u201d or \u201cNLGI 2\u201d is not a product identity.<\/p><form id=\"gc-form\" novalidate><div class=\"gc-grid\"><div class=\"gc-field\"><label class=\"gc-label\" for=\"gc-a\">Existing grease: manufacturer and exact product<\/label><input class=\"gc-input\" id=\"gc-a\" maxlength=\"300\" autocomplete=\"off\" placeholder=\"Manufacturer; product designation; revision\/batch if relevant\"><\/div><div class=\"gc-field\"><label class=\"gc-label\" for=\"gc-b\">Proposed grease: manufacturer and exact product<\/label><input class=\"gc-input\" id=\"gc-b\" maxlength=\"300\" autocomplete=\"off\" placeholder=\"Manufacturer; product designation; revision\/batch if relevant\"><\/div><div class=\"gc-field\"><label class=\"gc-label\" for=\"gc-relation\">Product identity<\/label><select class=\"gc-select\" id=\"gc-relation\"><option value=\"\">Select\u2026<\/option><option value=\"same\">Confirmed same manufacturer, designation and formulation\/revision<\/option><option value=\"different\">Different products, or exact identity not confirmed<\/option><\/select><span class=\"gc-help\">\u201cSame thickener\u201d is not \u201csame product\u201d.<\/span><\/div><div class=\"gc-field\"><label class=\"gc-label\" for=\"gc-test\">Exact-pair ASTM D6185-24 report<\/label><select class=\"gc-select\" id=\"gc-test\"><option value=\"\">Select\u2026<\/option><option value=\"unknown\">No complete exact-pair report \/ unknown<\/option><option value=\"pass\">Report: every tested mixture passed all three primary properties<\/option><option value=\"fail\">Report: at least one mixture failed a primary property<\/option><option value=\"partial\">Partial, composition-chart, single-property, old or custom evidence only<\/option><\/select><span class=\"gc-help\">Do not select \u201cpass\u201d from a thickener chart or marketing statement.<\/span><\/div><div class=\"gc-field\"><label class=\"gc-label\" for=\"gc-instruction\">Written OEM or supplier instruction for this exact pair\/application<\/label><select class=\"gc-select\" id=\"gc-instruction\"><option value=\"\">Select\u2026<\/option><option value=\"no\">None available \/ not checked<\/option><option value=\"yes\">Yes \u2014 exact document and procedure identified below<\/option><\/select><\/div><div class=\"gc-field\"><label class=\"gc-label\" for=\"gc-criticality\">Application consequence<\/label><select class=\"gc-select\" id=\"gc-criticality\"><option value=\"\">Select\u2026<\/option><option value=\"general\">General industrial equipment<\/option><option value=\"high\">High-consequence or safety-related equipment<\/option><option value=\"aviation\">Aviation \/ approved-lubricant application<\/option><\/select><\/div><div class=\"gc-field gc-wide\"><label class=\"gc-label\" for=\"gc-evidence\">Evidence record<\/label><textarea class=\"gc-textarea\" id=\"gc-evidence\" maxlength=\"1800\" placeholder=\"Report issuer\/date; tested product designations and ratios; primary-test result; OEM manual or supplier bulletin identifier; application and approval limits\"><\/textarea><span class=\"gc-help\">The worksheet does not verify uploaded or typed evidence. Preserve the actual report and controlled maintenance document.<\/span><\/div><\/div><p id=\"gc-error\" class=\"gc-error\" role=\"alert\"><\/p><\/form><section id=\"gc-results\" class=\"gc-results\" hidden data-json=\"\"><div id=\"gc-rhead\" class=\"gc-rhead\"><div id=\"gc-status\" class=\"gc-rtitle\">\u2014<\/div><div id=\"gc-pair\" class=\"gc-pair\">\u2014<\/div><\/div><div class=\"gc-rgrid\"><article class=\"gc-card\"><h3>Evidence basis<\/h3><p id=\"gc-basis\">\u2014<\/p><\/article><article class=\"gc-card\"><h3>Next action<\/h3><p id=\"gc-action\">\u2014<\/p><\/article><article class=\"gc-card\"><h3>What this does not prove<\/h3><p id=\"gc-limit\">\u2014<\/p><\/article><\/div><\/section><div class=\"gc-alert\"><strong>Decision boundary:<\/strong> compatibility is not lubricant suitability. A passing mixture test does not prove correct viscosity, load\/speed\/temperature performance, seal compatibility, corrosion protection, food\/aviation approval, relubrication interval or safe changeover for the machine.<\/div><\/section><\/main>\n<section class=\"gc-section\"><h2>ASTM D6185-24 decision logic<\/h2><p>The current ASTM store record identifies <strong>ASTM D6185-24<\/strong> as Active, last updated 5 December 2024. It is a laboratory practice for evaluating one or three binary mixtures of two exact lubricating greases relative to the neat greases. It is not a universal thickener compatibility table.<\/p><div class=\"gc-table-wrap\"><table class=\"gc-table\"><thead><tr><th>Evidence<\/th><th>Worksheet classification<\/th><th>Boundary<\/th><\/tr><\/thead><tbody><tr><td>Any tested mixture fails any primary test<\/td><td><strong>Incompatible by reported test result<\/strong><\/td><td>ASTM states testing stops at the first failure.<\/td><\/tr><tr><td>All tested mixtures pass all three primary properties<\/td><td><strong>Compatible in D6185-24 primary-test scope<\/strong><\/td><td>Secondary testing may still be appropriate; application suitability is separate.<\/td><\/tr><tr><td>Composition chart, one property, incomplete summary or no exact-pair report<\/td><td><strong>Unverified<\/strong><\/td><td>Do not convert \u201cunknown\u201d or \u201cindividual testing required\u201d into \u201cborderline\u201d.<\/td><\/tr><tr><td>Confirmed identical product<\/td><td><strong>Not a binary mixture of different greases<\/strong><\/td><td>Still verify formulation\/revision, condition, contamination control and OEM servicing instructions.<\/td><\/tr><\/tbody><\/table><\/div><h3>Primary protocol disclosed by ASTM\u2019s public scope<\/h3><div class=\"gc-table-wrap\"><table class=\"gc-table\"><thead><tr><th>Item<\/th><th>Publicly disclosed D6185-24 scope<\/th><\/tr><\/thead><tbody><tr><td>Mixtures<\/td><td>50:50; when three ratios are evaluated, 10:90 and 90:10 represent attempted changeover\/purging conditions.<\/td><\/tr><tr><td>Dropping point<\/td><td>ASTM D566 or ASTM D2265.<\/td><\/tr><tr><td>Shear stability<\/td><td>ASTM D217, 100,000-stroke worked penetration.<\/td><\/tr><tr><td>Elevated-temperature storage stability<\/td><td>Change in 60-stroke penetration using ASTM D217.<\/td><\/tr><tr><td>Decision<\/td><td>Any primary-test failure \u2192 incompatible; all tested mixtures pass all three \u2192 compatible in this practice\u2019s scope.<\/td><\/tr><\/tbody><\/table><\/div><p>Acceptance calculations, preparation details and mandatory procedural requirements must be taken from the licensed standard. This page does not invent clause numbers or limits.<\/p><\/section>\n<section class=\"gc-section\"><h2>Why the former matrix was removed<\/h2><p>ASTM D6185-24 states that compatibility cannot be predicted with certainty from grease composition; even nominally similar thickeners can be incompatible because of additive treatments. The previous page nevertheless returned \u201cfully compatible\u201d for equal thickener labels, returned \u201cborderline\u201d for unspecified pairs and issued categorical claims for polyurea and base-oil families.<\/p><p>SKF\u2019s <em>Super-precision bearings<\/em> catalogue (PUB BU\/P1 13383\/2 EN, March 2016), tables 30\u201331, contains composition-based guidance for that bearing scope, but SKF explicitly says those tables are guidelines and recommends expert verification and application testing. Its entries also materially disagree with the former site matrix for multiple pairs. A scoped manufacturer chart therefore cannot be silently converted into a universal calculator.<\/p><p>Fixed purge multiples, universal cycle counts and fixed monitoring windows were also removed. Purge volume, solvent use, disassembly, venting, over-greasing risk and monitoring limits depend on equipment design and the controlled OEM procedure.<\/p><\/section>\n<section class=\"gc-section\"><h2>Primary and manufacturer sources<\/h2><ul><li><a href=\"https:\/\/store.astm.org\/standards\/d6185\" target=\"_blank\" rel=\"noopener\">ASTM D6185-24 official record<\/a> \u2014 Active; exact-pair binary-mixture test protocol and public decision scope.<\/li><li><a href=\"https:\/\/cdn.skfmediahub.skf.com\/api\/public\/0901d19680495562\/pdf_preview_medium\/0901d19680495562_pdf_preview_medium.pdf\" target=\"_blank\" rel=\"noopener\">SKF Super-precision bearings, March 2016<\/a>, tables 30\u201331 \u2014 composition tables are explicitly guidelines; SKF calls for expert verification and application testing.<\/li><li><a href=\"https:\/\/www.exxonmobil.com\/en\/aviation\/knowledge-library\/resources\/grease-compatibility-conversion\" target=\"_blank\" rel=\"noopener\">ExxonMobil Aviation grease compatibility and conversion<\/a> \u2014 exact formulations, testing and OEM cleaning instructions; aviation practice is more restrictive.<\/li><li><a href=\"https:\/\/www.shell.com\/business-customers\/aviation\/aeroshell\/knowledge-centre\/faqs.html\" target=\"_blank\" rel=\"noopener\">Shell AeroShell grease FAQ<\/a> \u2014 additive interactions matter and products approved to the same specification can still be incompatible.<\/li><\/ul><p>Accessed 12 July 2026. Always use the current controlled OEM\/service document for the actual machine.<\/p><\/section><footer class=\"gc-footer\">\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u00b7 Scientific review July 2026<\/footer><\/div>\n<script>(function(){'use strict';function $(id){return document.getElementById(id)}function clean(){['gc-status','gc-pair','gc-basis','gc-action','gc-limit'].forEach(function(id){$(id).textContent='\u2014'});$('gc-results').setAttribute('hidden','');$('gc-results').dataset.json=''}function fail(message){clean();$('gc-error').textContent=message}function calculate(){var a=$('gc-a').value.trim(),b=$('gc-b').value.trim(),relation=$('gc-relation').value,test=$('gc-test').value,instruction=$('gc-instruction').value,criticality=$('gc-criticality').value,evidence=$('gc-evidence').value.trim();var started=a||b||relation||test||instruction||criticality||evidence;if(!started){$('gc-error').textContent='';clean();return}if(!a||!b||!['same','different'].includes(relation)||!['unknown','pass','fail','partial'].includes(test)||!['no','yes'].includes(instruction)||!['general','high','aviation'].includes(criticality)||!evidence){fail('Complete both exact product identities,all evidence selections,application consequence and the evidence record.');return}var code,level,status,basis,action,limit='Compatibility does not establish lubricant or application suitability;follow the controlled OEM\/service requirements.';if(test==='fail'){code='TEST_FAIL';level='fail';status='INCOMPATIBLE BY REPORTED D6185-24 RESULT';basis='At least one tested mixture reportedly failed a primary property. ASTM D6185-24 classifies the pair as incompatible at the first primary-test failure.';action='Do not intentionally mix. Quarantine the changeover until the equipment OEM and lubricant supplier define an approved removal,cleaning,refill and verification procedure.'}else if(relation==='same'){code='SAME_PRODUCT';level='info';status='SAME IDENTIFIED PRODUCT \u2014 BINARY-MIXTURE TEST NOT APPLICABLE';basis='You declared the same manufacturer,product designation and formulation\/revision. This is replenishment with one identified product,not evidence about two different greases.';action='Verify container identity,condition and contamination controls;then follow the machine\u2019s normal approved lubrication procedure. Do not interpret a shared thickener or NLGI grade as identical product.'}else if(test==='pass'){code='TEST_PASS';level='pass';status='COMPATIBLE IN D6185-24 PRIMARY-TEST SCOPE';basis='The evidence record reportedly shows that every tested exact-pair mixture passed all three primary properties. This is a laboratory compatibility result within the report\u2019s ratios and conditions.';action=instruction==='yes'?'Follow the identified OEM\/supplier changeover document exactly and verify application performance within its stated limits.':'Obtain and follow an exact application changeover instruction from the equipment OEM or lubricant supplier before changing grease.'}else if(instruction==='yes'){code='DOCUMENTED_GUIDANCE';level='warn';status='EXACT-PAIR GUIDANCE RECORDED \u2014 COMPATIBILITY NOT VERIFIED HERE';basis='A written OEM or supplier instruction is recorded,but no complete passing D6185-24 report was selected. The document\u2014not this worksheet\u2014defines the allowed procedure and scope.';action='Confirm document revision,product designations,equipment applicability and approval authority;then follow it without adding generic purge quantities or intervals.'}else{code='UNVERIFIED';level='warn';status='UNVERIFIED \u2014 DO NOT INFER COMPATIBILITY';basis=test==='partial'?'Only partial,composition-based,older or custom evidence is available. It cannot be converted into a D6185-24 pass.':'No complete exact-pair D6185-24 report or controlled exact-pair instruction is recorded.';action='Ask both lubricant supplier and equipment OEM for exact-pair evidence and a controlled changeover procedure. If compatibility must be established,commission testing appropriate to ASTM D6185-24 and the application.'}if(criticality==='high')action+=' Treat the change as a managed high-consequence maintenance change with authorization and defined acceptance\/monitoring limits.';if(criticality==='aviation')action+=' Use only approved lubricant and aircraft\/component maintenance instructions;this worksheet is not an approval basis.';$('gc-error').textContent='';$('gc-rhead').className='gc-rhead '+level;$('gc-status').textContent=status;$('gc-pair').textContent=a+' \u2194 '+b;$('gc-basis').textContent=basis;$('gc-action').textContent=action;$('gc-limit').textContent=limit;$('gc-results').dataset.json=JSON.stringify({classification:code,relation:relation,test:test,instruction:instruction,criticality:criticality});$('gc-results').removeAttribute('hidden')}$('gc-form').addEventListener('input',calculate);$('gc-form').addEventListener('change',calculate);calculate()})();<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Gratis online kontroll av sm\u00f8remiddelkompatibilitet. Sjekk kompatibilitetsmatrisen for fettfortykningsmidler for blanding av litium, polyurea, kalsium, aluminiumkompleks, barium og mer. Anbefalinger for spyling.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100145","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100145\/revisions"}],"predecessor-version":[{"id":102470,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100145\/revisions\/102470"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=100145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=100145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=100145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}