<?xml version="1.0" encoding="UTF-8" standalone="no"?><xbrli:xbrl xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:in-capmkt="https://www.sebi.gov.in/xbrl/2023-06-30/in-capmkt" xmlns:in-capmkt-ent="https://www.sebi.gov.in/xbrl/Closure_Of_Trading_Window/2023-06-30/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="https://www.sebi.gov.in/xbrl/Closure_Of_Trading_Window/2023-06-30/in-capmkt-roles" xmlns:in-capmkt-type="https://www.sebi.gov.in/xbrl/2023-06-30/in-capmkt-types" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:xlink="http://www.w3.org/1999/xlink"><link:schemaRef xlink:href="in-capmkt-ent-2023-06-30.xsd" xlink:type="simple"/><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">MRPL</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2025-03-20</xbrli:instant></xbrli:period></xbrli:context><in-capmkt:NameOfTheCompany contextRef="MainI">MANGALORE REFINERY AND PETROCHEMICALS LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:NSESymbol contextRef="MainI">MRPL</in-capmkt:NSESymbol><in-capmkt:ScripCode contextRef="MainI">500109</in-capmkt:ScripCode><in-capmkt:MSEISymbol contextRef="MainI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="MainI"> INE103A01014</in-capmkt:ISIN><in-capmkt:TypeOfAnnouncementForClosureOfTradingWindow contextRef="MainI">New</in-capmkt:TypeOfAnnouncementForClosureOfTradingWindow><in-capmkt:TypeOfEventForClosureOfTradingWindow contextRef="MainI">Closure of Trading Window</in-capmkt:TypeOfEventForClosureOfTradingWindow><in-capmkt:DateOfStartOfTradingWindowClosure contextRef="MainI">2025-04-01</in-capmkt:DateOfStartOfTradingWindowClosure><in-capmkt:BriefDetailsForTradingWindowClosureEndDate contextRef="MainI">Till 48 hours after the conclusion of the Board Meeting for consideration and approval of Audited Financial Results. The date of the Board meeting for consideration and approval of Audited Financial Results for the 4th Quarter and Year ended March 31, 2025, will be intimated in due course.</in-capmkt:BriefDetailsForTradingWindowClosureEndDate><in-capmkt:PurposeOfTheClosureOfTradingWindow contextRef="MainI">Audited Financial Statements for the 4th Quarter and Year ended March 31, 2025.</in-capmkt:PurposeOfTheClosureOfTradingWindow><in-capmkt:DateOfReport contextRef="MainI">2025-03-20</in-capmkt:DateOfReport></xbrli:xbrl>