I just purchased a CPO 2018 Impala Premier and the % oil life remaining was at 100% when I left the dealer, but it’s already fallen to 89% after less than 450 miles, which would translate to having my next service done at approximately 4500 miles. I live in San Diego by the coast, so the temp is always mild (60-75) and most of my driving is easy city or freeway (no mountains), and I don’t drive aggressively. Is this typical? I was expecting to be able to go around 7500 miles in between scheduled servicing since my driving is pretty average. Any insight?