My S90 has 388,000km and about a year ago I used to add 1L every 1000km. I started using Lucas 1L with each oil change for about 4-5 oil changes, each time putting 1L with an oil change. After that I stopped using it and now I go through 1-1.5L/7000km which I think is normal. I drive all highway and change my oil every 7000km. These engines develop sludge issues if the oil isnt replaced very often. Make sure to replace your oil separator also, its a pain but needs to be done!!
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1998 Volvo S90 SE (Black Cherry) 264,000+km
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