Let’s say time=mileage. I haven’t had my oil pump serviced in the ~year I’ve had the car, the previous owner didn’t have it serviced while they had the car (~5 years) and no clue about the owner before them. Would it be prudent to replace the oil pump once I drain my oil and check for filings, eliminate that variable? And if that’s the case, should I go standard volume or high volume? Summit sells a standard volume for a bit over $80 which doesn’t seem bad, but what am I in for if I replace it myself?