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This is a fresh sample of bmw oil 0w20 sent to the lab . The second oil sample is bmw 0w20 Current mileage 5100 lots of idling time . I choose to do a oil change myself will let the dealer do next oil service at approximately in 4800 miles I believe I'll be doing the oil change every 5000 miles. Due to the low TBN I would say 7500 would be the limit on the BMW oil
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