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Thoughts on pre oil change engine flush?
Anyone do a pre oil change engine flush on their M5?
I've got my car going in for service tomorrow and am always keen to 'do what I can' from a servicing/preventative maintenance perspective. Given this I was thinking about using the Liqui-Moly Engine Flush Plus prior to the old oil being dropped.
Anyone used it before and/or got thoughts either way?
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