Can I use 5W-30 instead of 0W-30

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Can I use 5W-30 instead of 0W-30

XC90 '02–'15 General Forum for the P2-platform XC90 model

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Aug 13th, 2022, 15:41	#1
XC90Mk1 Premier Member Last Online: Feb 16th, 2024 13:43 Join Date: May 2018 Location: Na	Can I use 5W-30 instead of 0W-30 Hi all, The XC90 is serviced every 6-10k with fresh 0W-30to A5/B5 from Volvo. The oil is always pretty black even with those intervals and once changed soon darkens again. I have 8l of Castrol 5W-30 instead of 0W-30. The castrol is also A5/B5. It is my intention to put the castrol in for 2,500 miles and then dump and refil with the correct 0W-30. The only reason I wish to use the castrol is as I bought it very cheap a few years (5) ago and now no longer have the car. I thought it may make a good flushing oil. Anyone have any comments? Thanks.

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