Waste　tire　(WT)　being　an　environmental　pollutant　is　attracting　feedstock　for　producing　oil　and　chemicals.　Another　important　feedstock　is　off-shore　oil　sludge　(OOS)　having　considerable　amount　of　hydrocarbons　to　produce　oil.　First　time,　side　wall　waste　tire　(SWWT)　has　been　co-pyrolyzed　in　this　study　with　OOS.　Primarily,　altered　experimentations　were　conducted　to　find　optimal　mixing　ratio　of　waste　tire　and　oil　sludge　with　respect　to　temperature,　nitrogen　flow　rates　and　product　yields.　Kinetic　parameters　have　been　found　by　using　Coats　Redfern　method.　The　results　showed　that　activation　energies　and　pre-exponential　factors　were　in　the　range　of　25–88.22　kJ　mol−1　and　3.13　×　10−4–23.13　s−1.　The　highest　oil　yield　of　64.9　wt%　was　observed　at　500　°C　with　100　ml　min−1　and　15　°C　min−1　for　OOS.　While　optimum　blend　ratio　is　75　SWWT/25　OOS　due　to　better　char　and　oil　properties.　Co-pyrolytic　oil　comprised　of　high　oxygen,　nitrogen　and　heavy　molecular　hydrocarbons　specially　from　100%　OOS.　On　the　other　side,　char　properties　were　encouraging　due　to　higher　surface　area　and　pore　volume;　SWWT　in　the　blend　ratios　resulted　52　m2　g−1　as　higher　specific　surface　area.　The　gas　analysis　revealed　that　C2-C3　gas　components　are　higher　with　methane,　carbon　dioxide　and　carbon　monoxide　and　hydrogen　during　co-pyrolysis.　Hence,　co-pyrolysis　of　waste　tire　and　offshore　oil　sludge　is　promising　way　for　not　only　reducing　environmental　hazards　but　also　for　producing　oil　and　chemicals　to　contribute　for　circular　economy.　©　2020　Elsevier　Ltd