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I also have a 2005 Range Rover. I am a mechanic also. The factory recommends ONLY synthetic oil every 15,000 miles. I change my oil and filter every 7,500 miles. It is simply against my beliefs to go 15,000 miles. It is up to you, but I'd do it every 7,500 miles at LEAST. Good Luck with it! BABABONDOMAN

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16y ago

What else can I help you with?