I want to do oil changes every 7500 miles. Should I trust my oil service indicator for this interval? That is, when it hits 7500, should I get my oil changed, or go with what my local BMW shop put on my sticker? They did use LL-01 oil. I do know the service indicator adapts to your driving style and distance, so I feel that it can be trusted, but I honestly do not know if I should trust it since BMW says 15000 is good, but we all know it's not.