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<?xml version="1.0" encoding="windows-1252"?> |
<!-- Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 13-March-2024 [02:34:36] {AM} --> |
<schema targetNamespace="http://oa.com/20240312" elementFormDefault="qualified" xmlns:oscf="http://oa.com/20240312" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:country="http://xbrl.sec.gov/country/2023" xmlns:currency="http://xbrl.sec.gov/currency/2023" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:exch="http://xbrl.sec.gov/exch/2023" xmlns:naics="http://xbrl.sec.gov/naics/2023" xmlns:sic="http://xbrl.sec.gov/sic/2023" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:stpr="http://xbrl.sec.gov/stpr/2023" xmlns:deprecated="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" xmlns:srt="http://fasb.org/srt/2023" xmlns:srt-types="http://fasb.org/srt-types/2023" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:cef="http://xbrl.sec.gov/cef/2023" xmlns:cef-pre="http://xbrl.sec.gov/cef-pre/2023"> |
| <annotation> |
| | <appinfo> |
| | | <link:roleType roleURI="http://oa.com/role/N2FeeTable" id="N2FeeTable"> |
| <link:definition> 1001 - Disclosure - N-2 - [Fee Table] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://oa.com/role/N2SeniorSecurities" id="N2SeniorSecurities"> |
| <link:definition> 1002 - Disclosure - N-2 - [Senior Securities] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://oa.com/role/N2InvestmentObjectives" id="N2InvestmentObjectives"> |
| <link:definition> 1003 - Disclosure - N-2 - [Investment Objectives] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://oa.com/role/N2RiskFactors" id="N2RiskFactors"> |
| <link:definition> 1004 - Disclosure - N-2 - [Risk Factors] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://oa.com/role/N2EffectsOfLeverage" id="N2EffectsOfLeverage"> |
| <link:definition> 1005 - Disclosure - N-2 - [Effects of Leverage] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://oa.com/role/N2CapitalStock" id="N2CapitalStock"> |
| <link:definition> 1006 - Disclosure - N-2 - [Capital Stock] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://oa.com/role/N2OutstandingSecurities" id="N2OutstandingSecurities"> |
| <link:definition> 1007 - Disclosure - N-2 - [Outstanding Securities] </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| </link:roleType> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="oscf-20240312_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="oscf-20240312_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="oscf-20240312_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | </appinfo> |
| | </annotation> |
| <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/> |
| <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/> |
| <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/> |
| <import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd"/> |
| <import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/> |
| <import namespace="http://xbrl.sec.gov/cef/2023" schemaLocation="https://xbrl.sec.gov/cef/2023/cef-2023.xsd"/> |
| <import namespace="http://xbrl.sec.gov/cef-pre/2023" schemaLocation="https://xbrl.sec.gov/cef/2023/cef-2023_pre.xsd"/> |
| <element name="CapitalGainsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_CapitalGainsMember" substitutionGroup="xbrli:item"/> |
| <element name="InvestmentsIncomeMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_InvestmentsIncomeMember" substitutionGroup="xbrli:item"/> |
| <element name="SellingCommissionMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_SellingCommissionMember" substitutionGroup="xbrli:item"/> |
| <element name="ClassDSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_ClassDSharesMember" substitutionGroup="xbrli:item"/> |
| <element name="ClassISharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_ClassISharesMember" substitutionGroup="xbrli:item"/> |
| <element name="ClassSSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_ClassSSharesMember" substitutionGroup="xbrli:item"/> |
| <element name="ClassTSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_ClassTSharesMember" substitutionGroup="xbrli:item"/> |
| <element name="CommonSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_CommonSharesMember" substitutionGroup="xbrli:item"/> |
| <element name="CIBCSPVFacilityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_CIBCSPVFacilityMember" substitutionGroup="xbrli:item"/> |
| <element name="INGCreditAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_INGCreditAgreementMember" substitutionGroup="xbrli:item"/> |
| <element name="JPMSPVFacilityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_JPMSPVFacilityMember" substitutionGroup="xbrli:item"/> |
| <element name="SMBCSPVFacilityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_SMBCSPVFacilityMember" substitutionGroup="xbrli:item"/> |
| <element name="TwoThousandTwentyEightUnsecuredNotesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_TwoThousandTwentyEightUnsecuredNotesMember" substitutionGroup="xbrli:item"/> |
| <element name="FederalIncomeTaxRisksMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_FederalIncomeTaxRisksMember" substitutionGroup="xbrli:item"/> |
| <element name="GeneralRiskFactorsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_GeneralRiskFactorsMember" substitutionGroup="xbrli:item"/> |
| <element name="MarketLegalAndRegulatoryRisksMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_MarketLegalAndRegulatoryRisksMember" substitutionGroup="xbrli:item"/> |
| <element name="RisksRelatedToAnInvestmentInTheFundAndTheCommonSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_RisksRelatedToAnInvestmentInTheFundAndTheCommonSharesMember" substitutionGroup="xbrli:item"/> |
| <element name="RisksRelatedToOurInvestmentsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_RisksRelatedToOurInvestmentsMember" substitutionGroup="xbrli:item"/> |
| <element name="RisksRelatedToTheAdviserAndItsAffiliatesConflictsOfInterestMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_RisksRelatedToTheAdviserAndItsAffiliatesConflictsOfInterestMember" substitutionGroup="xbrli:item"/> |
| <element name="PreferredSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="oscf_PreferredSharesMember" substitutionGroup="xbrli:item"/> |
| </schema> |