Few months ago i bought a 5L jug of 5w30 ACEA C2, API SN/CF oil for someone's oil change but the person sold the car before we even did the oil change. The specs/approvals are PSA B71 2290, RN 0700 and seems to be suited to asian vehicles too. Since i don't use low HTHS or low SAPS oil i don't know what to do with it, can i mix one liter with the remaining four/five/six liters of Xw40 when i change the oil in other cars or just give it away?